A colorful architectural gem in Seattle's uniquely modern Central Library.

The first park built over a freeway is a brutalist masterwork.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

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

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

This painted blacktop brings the classic arcade game to life.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

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

A sliver of nostalgia in Seattle's Viretta Park.

This edible park is open to any and all foragers.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Try not to get slimed in Tribeca.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Become a prohibition rebel.

A terrific purveyor of natural history objects and curios.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Tucked in the back of this amazing antique store is an important piece of medical history.

New York City's smallest piece of private property.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

New York's oldest magic store.