Berlin's old airport.

Started as a kitchen garden, now the second largest botanical garden in the world.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

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

This handsomely carved wooden church is more than 800 years old.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A community gathering place that once housed half-ton tanks and the World's Fair.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

This working class sculpture pounds his hammer all the livelong day.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

Seattle’s Whimsical Mural Master.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This former coal gasification plant found a curious second life as a popular public park.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

At this local mall, visitors are ushered through a 1940s jail exhibit.