A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

France's most famous cemetery, with some of its most curious tombs.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This garden boasts a magnificent collection of orchids and a spectacular view of the surrounding valley.

This roadside monument commemorates the huge weapon built by an Ethiopian emperor's hostages.

This dais was said to be a remote toilet built for the convenience of the British Royal Party on their brief, and only, visit to this small African nation in 1947. But is the story true?

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Only a fragment of this 15th-century Dance of Death survives today.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

A swing to dangle you off the very edge.

The hike to this stunning waterfall on a black sand beach is not for the faint of heart.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

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

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

An ancient necropolis of magnificent tombs.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.