Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A small part of Russia that does not touch any other part of Russia.

A regular looking rock with an unbelievable history.

This Cold War–era fallout shelter was actually a storage facility for the nation's emergency currency.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

This indoor ski resort has a mountain contained inside a mall.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The only diamond mine in the world where you can keep what you find.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This 16th-century mosque is the hallmark of the African architectural legacy in India.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

The world’s largest Masonic temple was saved by the White Stripes.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A landmark in the history of technology and computing is hidden in a tiny Baroque chapel.