The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

The "Prussian Versailles" that is as glorious today as when it was built.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A slice of central Asia in the middle of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

Ruins of an aerial tramway that ran for only eight years.

World's largest barrel containing an inn.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

A German apartment building hosting as many trees as human occupants.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

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

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

This Javanese-Hindu temple from the 15th century is unmissable for anyone with even a passing interest in erotic art.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Eighty million natural history specimens call this gargantuan museum home.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

This monolithic slab of art metal crowns a German slag heap.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.