Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

This building has two facades of clashing architectural designs.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This artificial archipelago was supposed to resemble a map of the world.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An extravagant monument to an extravagantly unpopular Emperor.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

Climb to the top of the world's largest seated bronze Buddha.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

Large Hadron Collider and the Birthplace of World Wide Web.

Op-art architecture designed for happiness.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

Few other hotels can rival the grandeur of the Castle in the Rockies.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Moscow's imposing monument to the Space Age.

Museum celebrating the achievements of the Soviet space program.

Immortal combat in a Moscow museum.