The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

Community owned and operated, this property is home to a diverse set of nudists.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

Abandoned silver mine strewn with wrecked and twisted structures.

A monument celebrating the idea of reaching inaccessible places.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

This defunct, fortress-like prison has been the setting for several movies.

Visit this playground of waterfalls, caves and sinkholes.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

An enormous natural sandstone bridge in Kentucky.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

This little gem of a museum is a hidden jewel filled with prehistoric treasures.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

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

First crafted during the 19th century, the mill was fully restored in 1983.

These waterfalls can be twins or triplets, depending on how much it's rained recently.

These otherworldly limestone formations jut out from the Kansas prairie.

An underground river pushes more than 200 million gallons out of this Missouri spring every day.