This unusual subway stop was originally a real estate office.

Tucked in Mumbai’s wealthiest neighborhood is one of the city’s oldest and most sacred sites: a temple complex believed to house the waters of the Ganges.

An extraordinary "City of Caves" carved from solid stone.

This museum houses an imposing skeleton army comprised of creatures great and small.

One of the world's heaviest musical instruments towers within a popular urban park.

This famed marionette theater and museum is bursting with imaginative string puppets.

A towering monument to war, located on a beautifully peaceful hill.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

Largest illuminated advertisement sign in the world.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The fairy tale castle of the "fairy-tale king."

An eerie, derelict amusement park in Berlin.

A slice of central Asia in the middle of Berlin.

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

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

The final resting place of many of Germany's most famous communists.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

A quaint Russian village in the middle of a German metropolis.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.