This buzzy, award-winning building hovers 85 feet above the ground on a dozen colorful stilts.

The artwork commemorates the many ways 20th-century people perished while on the clock.

A touching tribute to the "Wonky Donkey."

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

Memorial to one of the most fatal fires in both circus and U.S. history.

Journey inside the bowels of this sperm whale sculpture.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The headquarters of the famous Yale society.

This statue honors a pillar of the early New Haven Black community.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

A museum marks and documents the site of the Titanic's launch.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

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

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Op-art architecture designed for happiness.

A fearsome dragon clings to a corner of Munich's city hall.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Climb inside an iron crystal magnified 165 billion times its normal size.