Cathedral carved out of salt, located a mile below the earth's surface.

This tiny shop has been serving traditional tamales for more than 200 years.

Colombia's biggest botanical garden contains plants from all across the country.

This whimsical home made entirely from clay is basically a giant piece of pottery.

This picturesque mansion has gone from opulent ruin to nature museum.

This Great Depression-era creation was once known as the strangest house in the world.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Sloth rehabilitation center in the jungle of Costa Rica.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

This abandoned hospital is one of the most haunted places in Costa Rica.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

This Ecuadorian cemetery is home to a jaw-dropping topiary wonderland.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

Enchanting cave with a river crashing through the roof.

An explosion of natural color known as "the river that ran away from paradise."

Stroll through a wonderland of stupendous moss-covered trees.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

The world's only known button museum.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.