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

Dine amidst exotic plants at this former royal greenhouse.

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

An exquisite Baroque church in Vienna's old town.

Designed as a reminder of one of the darkest moments in Austrian history.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

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

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

The solemn exterior conceals an opulent interior of this 17th century church.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Lost subway station nestled beneath Toronto's busy commuter line.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

A condom-covered Thai restaurant that is more concerned with birth control than food.

This giant sculpture made of trash is a critique of society's wastefulness.

The oldest restaurant in Portland serves fiery coffee cocktails and an astounding amount of turkey.

10,000 flowered plants bloom in the City of Roses.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

The longest and widest floating bridge in the world.