Caves that can't seem to quit producing the remains of prehistoric humans.

Home to some of the oldest hominid fossils ever found.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

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

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

Largest monument in Colombia depicts 14 lancers who drove back an army.

Shop the world's largest number of ice cream flavors, ranging from delightful to downright bizarre.

Dr. Farid Mattar's Monument of Peace.

This Swedish astronomical clock was in storage for almost a century before its glorious workings were put on display once more.

Large Hadron Collider and the Birthplace of World Wide Web.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

Bell tower juts out from a village buried under a lake.

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

A deadly ancient portal to the underworld.

The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This famous city eluded concrete detection until the early 2000's.

Fantastic lake on the heart of a fault line.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

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

Roman ruins, natural methane fires and a lovely beach.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.