When the rain falls, this drain system turns into a musical instrument.

Ruins of a German Castle on top of a towering stone pillar.

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

Steadily reminding Czechia of its past.

A Jenga-style cylindrical tower of books that appears to go on forever.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A mocking tribute to the past and modern leadership of Prague.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This bazaar is one of the oldest in the Arabian world.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

Why walk on this historical site when you can zoom down instead?

This probably wasn't what Mao had in mind.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Gargantuan home of Russian science.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.