American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

An art deco ice cream shop covered in vintage train station tiles.

Gutted airplanes slowly decay in a Florida field.

A nude beach alongside a washed-out road.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

This now-deactivated naval base defended the Florida coast for centuries.

A peaceful, unique botanical garden complete with waterfalls, mini islands, and swans.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

Get up close with some alligators at this roadside farm attraction.

The highway's southernmost spot is a beloved local attraction.

Mile-long cave system near Great Smoky Mountains.

This abandoned prison castle has become an imposing gallery of graffiti art.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This large midwestern cavern features impressive rock formations and an underground waterfall.

This seemingly charming home memorializes and honors the victims of a century-old unsolved murder.

Rare recess caves fill this unbelievably beautiful Ohio park.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

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

A former utopian healing center created by a huckster and built by derelicts.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.