The 606 is a decade in the making.

A Bibliophile's Dream.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

Former meatpacking facility turned vertical farm and sustainable business complex.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A hollow cement depiction of time's inexorable effect on the human body.

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

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

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A surreal museum of extraordinary industrial objects.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

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.

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

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

This conical hill was built as a testing ground for an engineer known as the Glider King.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

This shop for all your super spy needs hides an educational secret.

A monument to the art of slicing people open.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

A 20-meter (65-foot) robot towers over Tokyo Bay.