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!"

A church of bones, decorated with 40,000 human skeletons.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Macabre astrological automaton clock dating to the late 1400s.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.