This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Founded as a refugee camp, now a popular tourist spot.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The remains of diamond fever taken over by the desert.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Every autumn, this hillside is ablaze with red summer cypress.

Most-visited and most-photographed slot canyon in the American Southwest.

This abandoned fishing settlement may well be the greenest village in the world.

Roman ruins top white travertine terraces formed by ancient hot springs.

Tubing through a cave lit with glowworms is a magical underground experience.

An exquisite tunnel of cascading flowers.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A sculpture of a giant hand reaches for the stars in the middle of the Atacama desert.

A church of bones, decorated with 40,000 human skeletons.

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

A seemingly endless landscape of pure salt stretches far across Bolivia.

A magically clear, blue river that seems to spring from nowhere.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Man-made mineral caves house massive bat colony.