This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

Monasteries on rock pillars, once accessible only by frayed ropes.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The deadliest diving spot in the world is also a stunning geological marvel.

There is only one place in the world where the corners of four nations come together.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

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

A seemingly desolate park that belongs to two countries actually supports all kinds of wildlife.

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.

Home of the Large Hadron Collider and the birthplace of the 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.