Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

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.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

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

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

This ancient theater was once the home of fierce gladiatorial battles.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Rising from the sea like a stone monster.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

A quick trip around the globe through an amazing miniature exhibit.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

This slender three-story building has also had several famous residents.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

Salute the leader of the proletariat.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.