Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Cold war icon and onetime "hole" in the iron curtain.

Where once there was a train station bathroom, there is now this German burger joint.

The "Prussian Versailles" that is as glorious today as when it was built.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Blitzkrieg bop your way through Berlin's Ramones Museum.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

3,000 market stands in five former Zeppelin hangars.

Flamboyant architecture from the turn of 20th century.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Baroque celebration of the end of the Great Plague of Vienna.

The Habsburgs' royal collections of art and wonders.

The topiary maze at the Habsburg hunting lodge.

The beautiful baroque library of the Hapsburg empire.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Most prolific publishing house in the 1600s open to the public.

Descend into the tunnels to experience the life of a coal miner.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Cozy basement bar sports an inventory of over 2,000 beers.