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View of entrance to a tunnel
Fairfax Station, Virginia, USA - March 14, 2024: Active railroad tracks pass over the so-called “Bunnyman Bridge” at the Colchester Overpass in Fairfax County.
A freight train emerging from the Catoctin Tunnel on the C&O Canal Path  on the Appalachian Trail near Harpers Ferry
Dark rectangular corridor under the bridge
View of an Old Culvert in Autumn in Eastern Ohio
Inside a cicular kiln in Mildenberg (Brandenburg, Germany).
Trolley Tunnel on canal lock trail in Blackhand Gorge State Park
A long, dark, creepy tunnel.
tunnel in black and white with silhouettes of people in the background
Dirt road under a highway overpass in the White Mountain National Forest, New Hampshire, USA
The entrance to the Paw Paw Tunnel on the Chesapeake and Ohio Canal in West Virginia. The tunnel is 3,118 ft. long and was completed in the mid 1800s.\n\nThe image is also largely symbolic with a pathway leading into darkness, the great unknown of what is to come as a person starts a new beginning in life.
Moonville Tunnel in Ohio - Coal mineshaft tunnel - in Autumn
Lock 33 of the C&O Canal is located across from Harpers Ferry at the base of Maryland Heights, with its old lockhouse once housing the Salty Dog Tavern, the ruins of which are pictured here - Harpers Ferry National Historical Park
Long dark tunnel with small light at the end
abandoned railroad tunnel
Gunma, Japan -August 11, 2024: This is the Usui Pass Tunnel. It is a railway tunnel that passes through Usui Pass (between Yokokawa and Karuizawa) that opened in 1893.The line is now abandoned, and you can walk through it.There are currently 10 tunnels on the old line that you can pass through.\nIt has been designated as an Important Cultural Property of Japan, along with Usui Third Bridge (Megane Bridge), the largest 4-arch bridge in Japan.
A bike and hiking trail on a former railroad line with tunnel.
Light at the end of tunnel.
The Illinois Iron Furnace is the only remaining iron furnace structure in the state of Illinois. Iron was manufactured at the Illinois Furnace by the charcoal blast method. The exterior of the furnace was manufactured of large limestone blocks quarried near the town of Cave-In-Rock.
Brick tunnel image
Graham Cave SP - Cave Entrance - 1998. Scanned from Kodachrome 200 slide.
Old mine for extraction of sand and stone
The end of a tunnel leading to the lush, green outdoors.
Image of Small road going under stone tunnel with stone steps to the top
Fast falling clean mountain water in a river bed.
abandoned railroad tunnel
Mining Tunnel across the road from Salmon Glacier located in the town of Hyder, Alaska but situated within British Columbia.
At Steep Rock Preserve in Connecticut, abandoned tunnel of the Shepaug Valley Railroad, finished in 1872 by miners who blasted through 235 feet of bedrock -- barely larger than the train that went through it until 1948, and now a rail trail.
Litthle sping in the hill near Lillafured village, hungary
Free Images: "bestof:Paw Paw Tunnel North (downstream) Portal from HABS.tif en HABS says 3 GENERAL VIEW OF NORTH PORTAL OF TUNNEL - Chesapeake Ohio Canal Paw-Paw Tunnel 155 2 - 155"
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