Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

This tremendous timepiece was once the largest cuckoo clock in the world.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Stockholm's deepest subway station is also a stunning ecological wonder.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This modern, multimedia museum takes visitors on an evolutionary journey back in time.

This 135-year-old weather station studied the effects of the climate on human health.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

Apartment complexes built into huge repurposed natural gas tanks.

The beautiful baroque library of the Hapsburg empire.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This museum promotes informed contraception by documenting its often secret past.

A man throwing a giant severed hand towers over Antwerp’s main square.

The legendary giant's severed hand sits on Antwerp's popular shopping street.