Europe's official "zero-level," the equator of elevation.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

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

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

Cat art as far as the eye can see.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Germany has its very own Centralia, whose spark remains attributed to "spontaneous combustion."

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Rebuilt remains of a temple to Roman god Mithras.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Tiki luxury on Nob Hill.

Eighty million natural history specimens call this gargantuan museum home.

San Francisco's newly reopened hands-on science museum.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

An acoustic anomaly with a mysterious cause.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

This 700-year-old street food market features baby octopus and soy donuts.

This semi-secret storybook hedge maze is also the oldest garden in the city.