Home of a 28-foot tall stalagmite known as the War Club.

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

An abandoned coal mine reached by a steep hike.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

10,000 flowered plants bloom in the City of Roses.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

100-year-old shipwreck you can walk up to at low tide.

Shoreline strewn with the remains of ghostly fallen trees.

Rustic natural hot springs in the deciduous rain forest.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A nondescript Seattle restaurant inherited a piece of European history.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

The easternmost town in Alaska can only be accessed from Canada.

A 30-mile-long glacially-carved canyon leads to a massive pair of glaciers.

Roadside collection of 65,000 signs.

The resilient spirit of this remote mining town burns bright in its eclectic memorabilia.

A lasting testament to the Klondike Gold Rush.