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

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Legends surround an ancient tree trunk riddled with nails for good luck.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

Designed by the architect who also had a hand in crafting the Westminster Abbey and Bristol Cathedral.

This hidden green space is the city's second largest conservatory.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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.

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

The telescope that discovered Neptune.

A fake town founded by Western movie stars is now becoming a hip desert community.

The quirky salon doubles as a retro museum run by the world's leading "hairstorian."

Meet 'Big Josh,' the 20-foot-tall muffler man.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

The ghostly remains of an accidental sea.

An off-grid art installation that encourages its visitors to imagine a world without waste.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

A hand-built folk art installation covered with messages of God's love.

A stellar example of Art & Crafts architecture, and a movie set to boot.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.