The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Real bones which are said to have belonged to a Polish dragon.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The ancient tomb acts as a calendar that keeps perfect time.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

All of the Malaysian sweets at this shop are made daily with a whole lot of love.

You must take the A train... to the last active cemetery in Manhattan.

Rare moles meet activism at this Oaxacan eatery.

Serving Central Asian breads that range from cracker-crisp to warm and fluffy, this bakery brings Bukhara to Queens.

19th century cemetery hidden in Brooklyn's Prospect Park.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

These beautiful garden buildings are among the oldest surviving greenhouses in the United States.

This cave was once thought to be a hiding place for the devil.

Hundreds of personalized inscribed planks make up this historic boardwalk.

This old mill and former police station now present a world-class collection of Orthodox iconography.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

Last church of this militaristic WWII style.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

This small shop walked so America could run on Dunkin'.

No one messes with the Massachusetts sacred cod, not this time...

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.