Eat the ultimate iteration of Portugal's most beloved pastry.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Exchange a book at the entrance of this medieval Lovere alley.

Liechtenstein's royal family calls this medieval alpine castle home.

An underground passage is home to a guillotine that predates the French Revolution by more than two centuries.

The model behind the iconic 3D test model.

Acrosticism and palindromes on this randomly placed stone.

Wander through a maze of empty tombs to find the poles used to hang revolutionary patriots.

A collection of nostalgic items from the Showa era with an exhibit on the local ghost story of the Snow Woman.

In this Romani neighborhood lies a museum dedicated to the culture and history of the Roma.

On Nobel Street, a miniature statue of Alfred Nobel.

Ornamented with "Bristol Diamonds," this exotic shell grotto is considered to be the finest surviving example from the eighteenth century.

Largely overlooked, this little fountain on Museum Island is a whimsical tribute to a Prussian king nicknamed the “Fatty Flounder.”

Perhaps the world's cheapest vending machines.

Although called a funicular by both its owner and the locals this historic railroad is actually a rack and pinion system.

A small museum built by a family that survived the Siege of Sarajevo.

A journey through every aspect of the human body.

This Ottoman bridge is a rare covered bridge with shops, and considers itself the only bazaar bridge in the world.

A treasure trove of scientific instruments from the 17th and 18th centuries.

A portrayal of two lamps embraced and in love.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.

A phantasmagoric tomb honors a Belgian artist-scientist's contributions to the world of spooky entertainment.