- Metro tunnel under South Hayes Street
- Forest Glen station
- Escalators at Dupont Circle station, Q Street entrance
- Train stored in the tail track at Huntington [01]
- Train stored in the tail track at Huntington [02]
- Hampton Roads Bridge-Tunnel, westbound tube
- Dupont Circle north entrance [02]
- Dupont Circle north entrance [01]
- Hampton Roads Bridge-Tunnel, westbound [03]
- Hampton Roads Bridge-Tunnel, westbound [02]
- Sign for Exit 268
- Hampton Roads Bridge-Tunnel, westbound [01]
- Hampton Roads Bridge-Tunnel, westbound [05]
- Hampton Roads Bridge-Tunnel, westbound [04]
- Green Line train entering tunnel portal
- Tunnel portal north of West Hyattsville station
- K Street under Washington Circle
- Tuscarora Mountain Tunnel western portal
- Kittatinny Mountain Tunnel [02]
- Kittatinny Mountain Tunnel [01]
- Western portal of Blue Mountain Tunnel
- Tunnel portal outside Addison Road station
- Reconstruction of Connecticut Avenue under Dupont Circle
- Cryptic Room tunnel
- Dupont Circle Q Street entrance
- Wheaton station, inbound side [01]
- Wheaton station, inbound side [02]
- Wheaton station, inbound side [03]
- Fort McHenry Tunnel, Bore 2
- Chain marker in the snow
- Washington Metro chain marker
- Pedestrian tunnel under Queen City Drive
- Anarchy sign painted in Cumberland, Maryland pedestrian tunnel
- Abandoned shopping cart
- Tunnel beneath railroad tracks
- Railroad tracks at Harpers Ferry Amtrak station [01]
- Railroad tracks at Harpers Ferry Amtrak station [02]
- Railroad tracks at Harpers Ferry Amtrak station [03]
- Railroad tracks at Harpers Ferry Amtrak station [04]
- Railroad tracks at Harpers Ferry Amtrak station [05]
- Red Line tunnel between Metro Center and Gallery Place
- Box culvert under CSX tracks
- Winchester and Potomac Railroad Bridge [01]
- Winchester and Potomac Railroad Bridge [02]
- Winchester and Potomac Railroad Bridge [03]
- Winchester and Potomac Railroad Bridge [04]
- Marker graffiti in Harpers Ferry train station tunnel [01]
- Marker graffiti in Harpers Ferry train station tunnel [02]
- Freight train on CSX Cumberland Subdivision track
- Harpers Ferry tunnel portal
- Pedestrian walkway on CSX Cumberland Subdivision bridge
- Intersection of Shenandoah and Potomac Streets in Harpers Ferry
- Dusty Edwards Genesis fire alarm horn/strobe
- Forest Glen station
- Monitor-Merrimac Memorial Bridge-Tunnel
- Montgomery Village tunnel #11
- Interstate 264 after Midtown Tunnel [01]
- Interstate 264 after Midtown Tunnel [02]
- Interstate 264 after Midtown Tunnel [04]
- Interstate 264 after Midtown Tunnel [03]
- Ilchester Tunnel [01]
- Ilchester Railroad Bridge [01]
- Ilchester Tunnel [02]
- Escalator to upper level at Nauticus
- Selfie at Kittatinny Mountain
- Kittatinny Mountain Tunnel [03]
- Elyse smiles on a bridge overlooking the Kittatinny Mountain Tunnel
- Kittatinny Mountain Tunnel [04]
- Elyse photographs a streetlight [01]
- Elyse photographs a streetlight [02]
- Kittatinny Mountain Tunnel [05]
- DJI Air 2S prior to a flight in Pennsylvania
- Kittatinny Mountain Tunnel [06]
- Kittatinny Mountain Tunnel [07]
- Pennsylvania Route 641 at the turnpike
- Kittatinny Mountain Tunnel [08]
- Kittatinny Mountain Tunnel [09]
- Kittatinny Mountain Tunnel [10]
- Kittatinny Mountain Tunnel [11]
- Kittatinny Mountain Tunnel [12]