The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Bonsai trees that are up to a thousand years old.

An impressive if morbid collection of mummified remains from different eras of the region's history.

These medieval funerary monuments are now home to a colony of critically endangered vultures.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Houses are tucked between, on, and underneath giant boulders.

Ten shipwreck-shaped chalets lie along the sand dunes on Namibia’s Skeleton Coast.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

The ornate miniature mansions were built for Istanbul's feathered residents.

Sleep in the hay, spin the wheel and eat grain pellets to your heart's delight.

One of the cave cities of Crimea, built by the Goths in the sixth century.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

A micronation on an islet along the coast of a Portuguese island.

One of only five observatories in the world built to measure the Earth's wobble.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.