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

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Pilgrimage site for star-crossed lovers.

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

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

An ancient stone fortress considered by many to be the eighth wonder of the world.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Yup, that's a 330-foot yacht passing over the highway.

Largest illuminated advertisement sign in the world.

This micro-nation may be some sort of prank, but its constitution sure seems official.

At the base of this tower, a plaque marks the original center point of the Netherlands.