A salty cave excavated by elephants and the location of a deadly disease vector.

One of the world's oldest olive trees, thought to be over 2,000 years old.

A naturally beautiful, seemingly bottomless deep blue spring.

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

This centuries-old tree tells an unusual tale of vegetation and fertility in the desert.

3D war panorama in Damascus built with help from North Korea.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

A more chill but no less fascinating version of the famous ancient archeological site.

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

Landscape of bizarrely shaped desert mountains and innumerable rock carvings.

The most alien-looking place on Earth.

This historic observatory was established to keep shipwrecks from littering the Cape of Good Hope.

The remains of diamond fever taken over by the desert.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The world's largest bioluminescent area was undiscovered by science until 2005.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

Stay in your own little bubble.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

The palace of the King of Kings, burned by Alexander the Great.