High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A fiery crater has been burning in the Karakum Desert since 1971.

An exquisite tunnel of cascading flowers.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The atmospheric road was never meant to be so creepy.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

A gargantuan crystal kingdom.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

The most visited, and possibly most controversial, museum in Germany.

A slice of central Asia in the middle of Berlin.

A fortified city, home to a remaining population of five families

One of the most spectacular canyons in the world.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Crumbling necropolis set high above Fez.

Traditional 11th-century outdoor tannery.

Mosaics, storks, and brothels—this ancient city has it all.

Founded as a refugee camp, now a popular tourist spot.

London's old-school healing garden.

Hear the quietest sound from across the dome.

Luxurious hotel designed to stir the imagination of its many visitors.

Regency-era excess on the English Coast.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.