Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Monument to a suicide protesting the Soviet invasion.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

An existential riddle in the world's largest ancient castle.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

This doorless 20th-century elevator doesn't stop or slow down.

This spooky statue sits outside a famous Prague theater.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

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

A giant interactive periodic table with real samples of the elements.

The Hungarian biochemist whose research helped develop mRNA-based vaccines for Covid-19.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.