Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This blowhole is supposedly caused by a trapped monster.

This former luxury resort in Kaua'i is now an abandoned relic.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This black shoreline is made up of exploded lava particles.

The largest retailer of seashells in the world.

Former villa and estate of James Deering developed to preserve native tropical forests.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

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

A spiritual vortex among the red rocks in Sedona.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

A historic freight system that found the true gold rush is in tourism.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.