Natural Landform
View Exhibit mapThis category is for natural bridges or natural tunnels deemed notable enough to be listed alongside man-made bridges on the site.
Backbone Rock (Johnson County, Tennessee)
Cut in 1901, taken over by Park Service.Tunnel under Backbone Rock on TN 133 between Damascus VA and Shady Valley TN, TennesseeOpen to traffic
Natural Bridge (Rockbridge County, Virginia)
Naturally formed bridge, Built c.150,000,000 BCE, that carries Rt. 11 over Cedar CreekArch bridge over Cedar Creek on South Lee Hway (Rt. 11)Open to traffic
Natural Bridge (Hamilton County, Tennessee)
This natural bridge is in a dry branch ravine behind the Church of the Good Shepherd, just up from the Scenic Highway Bridge on Lookout Mountain in Tennessee60-foot long natural bridge, 15 feet high over unnamed dry branchOpen to pedestrians
Natural Bridge (Winston County, Alabama)
A natural landform that began developing c.200 million years ago.Arch bridgePark is open
NS - Natural Tunnel (Scott County, Virginia)
Railroad built through the naturally-formed tunnel in 1893.Tunnel under Natural Tunnel on Norfolk Southern RailwayOpen to traffic
Pioneer Cabin Tree Tunnel (Calaveras County, California)
Germinated appx 1,000 years ago; Hollowed out in the 1880s; Toppled January 8, 2017Lost Tunnel under Branches on North Grove TrailDestroyed by severe weather
Tunnel Log (Tulare County, California)
Germinated ?; Tree fell over the road in 1937; Tunnel cut in 1938.Tunnel/Tree over RoadOpen to traffic
Wawona Tree (Mariposa County, California)
Germinated approximately 2,300 years before it fell, Tunneled through in 1881; Fell in 1969 due to a heavy load of snow on its crownTunnelDestroyed by severe weather