The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.

Apartment complexes built into huge repurposed natural gas tanks.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

The long-lost final resting place of an accused witch.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

The grounds and buildings of an old wood pulp mill have been transformed into an innovative art park and museum.

The easternmost town in Alaska can only be accessed from Canada.

Northern Kentucky’s very own Notre Dame showcases intricate stained glass and the bones of saints.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This house certainly has a unique decor.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

Grab a latte at the birthplace of modern American skateboarding.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

Across from a hotel parking lot, a Confederate spy rests under a large tombstone with her Union Veteran husband behind a copse of trees in a small, well-maintained cemetery.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

The body of an unidentified woman, visible through a glass coffin, was discovered by accident.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Water of undetermined depth has attracted rare fish and cult leaders alike.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

Designed to allow funerals to proceed over the River Dulnain.

The haunting peak of an old church is all that remains of a drowned Brazilian city.

This Tudor cottage is adorned with many canary-clasping cats, which originally served as a reminder to a local clergyman of his pet's murderous ways.