The last bastion of Roman presence north of the Alps looms over a German town.

Hiding the longest subterranean river known in the world.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

An open-air sewer system that was covered piece-by-piece over 300 years.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

This elaborate temple was built around one of the Buddha's teeth.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

A Balinese resort, empty and trapped in time.

Hindu temple of the dead home to hundreds of long-tailed macaques.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

A unique project to help restore coral reefs in Bali.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

The rocky remains of an ancient Greek forest.

Flying high over the small island of Zákynthos is a giant tribute to the mainland.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"