Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

A blooming house of worship for the masses.

The world's second-largest sundial, made entirely out of stone.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

An industrial relic is now one of Europe's most staggering art spaces.

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

The fairy tale castle of the "fairy-tale king."

A pair of trees near a Hong Kong shrine are said to grant wishes, but only the ones they hold on to.

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

The once highest point in China blends symbolic design with a kick of adrenaline.