An abandoned town is hidden in Great Smoky Mountains National Park.

For decades these polar bears have roamed all around a Nashville neighborhood.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Colorful collection of antique musical oddities.

A tribute to a 13-year-old boy who was kidnapped in 1793 and escaped over two years later.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Victorian-era Egyptomania left its mark on this Nashville landmark.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

The symbol was surreptitiously built into the river bank by German prisoners of war.

A clear blue swimming hole with hidden caves, still unexplored.

These boots are made for selfies.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

Roadside attraction with more than 1,000 stuffed and mounted animal skins displayed in simulated natural habitats with hand-painted backdrops.

A registered historic landmark shrouded in unsettling local legends.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Step back in time on this preserved 1800s farm.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.