This private residence was the template for one of the most beloved television homes of all time.

The topiary maze at the Habsburg hunting lodge.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Visible below the waves are memorials to the city's Gold Rush dead.

Olfactory delights in San Francisco's Botanical Gardens.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Cold war icon and onetime "hole" in the iron curtain.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.