Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

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

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

A menagerie of concrete animals brought together from across New York City's parks.

This unique sculpture proved invaluable when it saved a train from careening off the tracks.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

Incredible sculptures inspired by obscure passages from the Bible.

Where unreadable addresses are read, 24 hours a day, seven days a week.

Visitors to this library are in for a real-world education in modernist architecture.

An enormous image of Utah's salt flats made entirely from tape.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.

Built in 1917, this building is home to the last working spring-loaded dance floor in Utah.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

A museum of carnival attractions where you are invited to ride the rides.

On the windswept Dakota plains there is a memorial to circus workers who were struck down by lightning.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.