An extensive collection of ancient Egyptian artifacts and mummies.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

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

Mile-long cave system near Great Smoky Mountains.

Enormous lake at the bottom of a unique cave system.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

Singing sand that stands as the final remains of an ancient lake.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

The longest living non-clonal organisms on Earth.

Experience a charming 1930's version of "infotainment."

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Maine's oldest diner also happens to win acclaim for its elevated comfort food.

Walk the same tracks that once ferried Gilded Age aristocrats to their vacation destinations.

An elderly widow still operates the incredibly detailed model railroad she and her husband built by hand.

The world's oldest and largest museum of mass transit vehicles.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

New Orleans' famous cemetery, located on the site of a former race track.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

Research missiles and rainbow auroras at the world's largest land-based rocket range.