Boonsboro Quarry
From Underfoot
Q49401533
mine in Washington County, Maryland, United States of America
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Location: 39.5464, -77.6628, KML, Cluster Map, Maps,
4 places
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Raven Rock Mountain Complex ⓘ
architectural structure -
Crystal Grottoes ⓘ
Cave in Maryland, United States -
Jacks Mountain Tunnel ⓘ
railway tunnel in Fairfield, Pennsylvania -
Harpers Ferry Tunnel ⓘ
railway tunnel in Washington County, Maryland
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| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|
| site | bunker | 1951 | Raven Rock Mountain Complex | underground structure, military base, bunker | Wikidata |
| site | cave | Crystal Grottoes | show cave, protected area | Wikidata | |
| site | tunnel | Jacks Mountain Tunnel | railway tunnel, tunnel | Wikidata | |
| site | tunnel | 1931 | Harpers Ferry Tunnel | railway tunnel | Wikidata |