From lefty Jewish gathering site to hip cultural site in just 80 years.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

Former estate of Lenin, now home to his death mask.

A natural history museum with an extensive collection of bird dioramas.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.