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{"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"auto","height":"600px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":false,"defzoom":14,"layers":["OpenStreetMap","Esri.WorldImagery"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":true,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":1,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EOld Warden Tunnel\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel in the UK\n\u003C/p\u003E\u003C/div\u003E","title":"Old Warden Tunnel@railway tunnel in the UK\n","link":"","lat":52.088,"lon":-0.375,"icon":"/images/d/d2/Red-marker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124856355\" title=\"Q124856355\"\u003EBedford Royal Observer Corps Group Headquarters\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ebunker, Royal Observer Corps Group Headquarters\n\u003C/p\u003E\u003C/div\u003E","title":"Bedford Royal Observer Corps Group Headquarters@ bunker, Royal Observer Corps Group Headquarters\n","link":"","lat":52.1422,"lon":-0.498844,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124945157\" title=\"Q124945157\"\u003EHemel Hempstead Dacorum Borough Council Emergency Centre\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ecivil defense center\n\u003C/p\u003E\u003C/div\u003E","title":"Hemel Hempstead Dacorum Borough Council Emergency Centre@ civil defense center\n","link":"","lat":51.7553,"lon":-0.473403,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124837838\" title=\"Q124837838\"\u003EHertford bunker\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ebunker\n\u003C/p\u003E\u003C/div\u003E","title":"Hertford bunker@ bunker\n","link":"","lat":51.7936,"lon":-0.0800283,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124945186\" title=\"Q124945186\"\u003ELuton County Borough Control\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ecivil defense center\n\u003C/p\u003E\u003C/div\u003E","title":"Luton County Borough Control@ civil defense center\n","link":"","lat":51.8759,"lon":-0.419452,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124945244\" title=\"Q124945244\"\u003ESt Albans City and District Council Emergency Centre\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ecivil defense center\n\u003C/p\u003E\u003C/div\u003E","title":"St Albans City and District Council Emergency Centre@ civil defense center\n","link":"","lat":51.7534,"lon":-0.335866,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124858342\" title=\"Q124858342\"\u003EWatford Royal Observer Corps Group Headquarters\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Ebunker\n\u003C/p\u003E\u003C/div\u003E","title":"Watford Royal Observer Corps Group Headquarters@ bunker\n","link":"","lat":51.668,"lon":-0.418858,"icon":"/images/6/6e/M_bunker.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q24993397\" title=\"Q24993397\"\u003EAshwell Quarry and Quarry Springs\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Ashwell Quarry and Quarry Springs@ quarry\n","link":"","lat":52.0403,"lon":-0.173697,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q21061934\" title=\"Q21061934\"\u003EBarkway Chalk Pit\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Echalk quarry\n\u003C/p\u003E\u003C/div\u003E","title":"Barkway Chalk Pit@ chalk quarry\n","link":"","lat":52.0111,"lon":0.0114091,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q27990706\" title=\"Q27990706\"\u003EBarrington Chalk Pit\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ESite of Special Scientific Interest, chalk quarry\n\u003C/p\u003E\u003C/div\u003E","title":"Barrington Chalk Pit@ Site of Special Scientific Interest, chalk quarry\n","link":"","lat":52.1421,"lon":0.0328004,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q24662438\" title=\"Q24662438\"\u003EBarrington Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Barrington Quarry@ quarry\n","link":"","lat":52.1435,"lon":0.0367776,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q5050176\" title=\"Q5050176\"\u003ECastle Lime Works Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Castle Lime Works Quarry@ quarry\n","link":"","lat":51.7087,"lon":-0.222457,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q24662499\" title=\"Q24662499\"\u003EDisused quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Disused quarry@ quarry\n","link":"","lat":51.9496,"lon":-0.473285,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q29467407\" title=\"Q29467407\"\u003EFinedon Top Lodge Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Finedon Top Lodge Quarry@ quarry\n","link":"","lat":52.3198,"lon":-0.64219,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20878146\" title=\"Q20878146\"\u003EHexton Chalk Pit\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Echalk quarry\n\u003C/p\u003E\u003C/div\u003E","title":"Hexton Chalk Pit@ chalk quarry\n","link":"","lat":51.957,"lon":-0.389633,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20711582\" title=\"Q20711582\"\u003EHill End Pit\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Echalk quarry\n\u003C/p\u003E\u003C/div\u003E","title":"Hill End Pit@ chalk quarry\n","link":"","lat":51.9009,"lon":-0.26027,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20979086\" title=\"Q20979086\"\u003EKensworth Chalk Pit\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Echalk quarry\n\u003C/p\u003E\u003C/div\u003E","title":"Kensworth Chalk Pit@ chalk quarry\n","link":"","lat":51.866,"lon":-0.516772,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20740388\" title=\"Q20740388\"\u003EMoor Mill Quarry, West\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Moor Mill Quarry, West@ quarry\n","link":"","lat":51.7121,"lon":-0.350415,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q22004821\" title=\"Q22004821\"\u003EPitstone Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Pitstone Quarry@ quarry\n","link":"","lat":51.821,"lon":-0.647191,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20979107\" title=\"Q20979107\"\u003ESundon Chalk Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Sundon Chalk Quarry@ quarry\n","link":"","lat":51.9366,"lon":-0.48959,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q24662498\" title=\"Q24662498\"\u003ESundon Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Sundon Quarry@ quarry\n","link":"","lat":51.9369,"lon":-0.492467,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q29019761\" title=\"Q29019761\"\u003EThrapston Station Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Thrapston Station Quarry@ quarry\n","link":"","lat":52.3881,"lon":-0.533151,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q20979111\" title=\"Q20979111\"\u003ETotternhoe Chalk Quarry\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Equarry\n\u003C/p\u003E\u003C/div\u003E","title":"Totternhoe Chalk Quarry@ quarry\n","link":"","lat":51.892,"lon":-0.567909,"icon":"/images/a/ab/M_mine.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q4748554\" title=\"Q4748554\"\u003EAmpthill Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Ampthill Tunnel@ railway tunnel\n","link":"","lat":52.0335,"lon":-0.513294,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q16996369\" title=\"Q16996369\"\u003ELinslade Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Linslade Tunnel@ railway tunnel\n","link":"","lat":51.9252,"lon":-0.676352,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q116702051\" title=\"Q116702051\"\u003ENorthchurch Tunnels\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Northchurch Tunnels@ railway tunnel\n","link":"","lat":51.7712,"lon":-0.584899,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124414239\" title=\"Q124414239\"\u003EWatford East Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Watford East Tunnel@ railway tunnel\n","link":"","lat":51.6818,"lon":-0.417879,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124407150\" title=\"Q124407150\"\u003EWatford Tunnels\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Watford Tunnels@ railway tunnel\n","link":"","lat":51.6817,"lon":-0.418816,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q124414230\" title=\"Q124414230\"\u003EWatford West Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Watford West Tunnel@ railway tunnel\n","link":"","lat":51.6816,"lon":-0.419225,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q116701682\" title=\"Q116701682\"\u003EWelwyn North Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Welwyn North Tunnel@ railway tunnel\n","link":"","lat":51.8368,"lon":-0.185101,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q116689751\" title=\"Q116689751\"\u003EWelwyn South Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Erailway tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Welwyn South Tunnel@ railway tunnel\n","link":"","lat":51.828,"lon":-0.190103,"icon":"/images/0/04/M_tunnel.png"},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca href=\"/Q7989445\" title=\"Q7989445\"\u003EWeston Hills Tunnel\u003C/a\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003Eroad tunnel\n\u003C/p\u003E\u003C/div\u003E","title":"Weston Hills Tunnel@ road tunnel\n","link":"","lat":51.9779,"lon":-0.176643,"icon":"/images/0/04/M_tunnel.png"}],"imageoverlays":null}
Bridge on road to south of old warden tunnel - geograph.org.uk - 371606
Old Warden Tunnel - geograph.org.uk - 275715
Trackbed from road bridge looking north towards Old Warden Tunnel - geograph.org.uk - 371609
