One of the few surviving "Wigwam"-themed motels.

Exact replica of the ancient monument, but much, much lighter.

A piece of outsider public art accompanied by a strange urban legend.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

The perfect place to take a family of giants for a beach vacation.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

This abandoned amusement park was built on a site with a dark history.

A historic coal mine that doubles as a museum and tourist attraction.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A swing to dangle you off the very edge.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

An abandoned asylum incorporated into a college campus.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.