A psychedelic labyrinth on the San Francisco bay.

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

A plaque on the side of a building is a small tribute to the woman who invented an iconic Berlin fast food.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

A fascinating insight into daily life in the Eastern Bloc.

Where once there was a train station bathroom, there is now this German burger joint.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

A wunderkammer of mysterious objects and stories.

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A surreal museum of extraordinary industrial objects.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

This old wooden funicular railway leads to a cemetery in the forest.

Seattle’s Whimsical Mural Master.

This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

Couple's personal collection of pinball machines turned public pinball museum.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A (slightly) grownup take on the classic retro arcade.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.