One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A golden egg-shaped sauna in the Arctic tundra.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

When the rain falls, this drain system turns into a musical instrument.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

A stairway to heaven, or to nowhere at all.

The secret medieval communication system will whisk your words above the noise of the crowd.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

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

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The Habsburgs' royal collections of art and wonders.

A spherical "micro-nation" in the heart of Vienna.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Handsomely crafted representations of our round planet.

The final resting place of the poets Shelley and Keats.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.