The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

Home to the deepest rift anywhere on Earth.

A spiritual vortex among the red rocks in Sedona.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This stimulating sex toy museum is sure to arouse the interest of its visitors.

This Japanese national treasure was originally built in 593.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

The 10,000 Torii shrine.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.