Climb to the top of its spiral spire for spectacular views of Copenhagen.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This building has a giant piercing through one of its corners.

A long-buried ancient ruin unearthed right in the middle of the city.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

New York's southernmost subway station is whimsically wavy.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

There must be a pun in this haystack somewhere...

A notorious punk house turned co-op.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Phil Mortillaro uses keys to bring art back to the Village.

Avoid gangster interaction while window-shopping.

Cryptic messages embedded in the New York City sidewalk.

Slyly buy a shake in the Parker Meridien lobby.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.