The steepest classic funicular in the world glides along a dizzying incline.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

This North Carolina store preserves a historic moment in America's movement for racial equality.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

One of the last doorless, continuously moving elevators still in use in the U.K.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

A cluster of granite granaries perched on stilts.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

All that remains of the fishing-vessel-turned-warship is its weathered hull.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

The quiet canyon has a tumultuous history involving a doomsday cult.

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

A perfect replica of the beloved show's first set.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.