A unique botanical garden housed in three giant geodesic domes.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A trailblazing sovereign nation tucked in the American state of Wisconsin.

The oldest certified bowling alley in the United States is in the basement of this century-old bar.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

Robots, lasers, and whoopee cushions, oh my!

Why walk on this historical site when you can zoom down instead?

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

An annual extravaganza of Broadway theater memorabilia.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

A bit of retro transportation flair preserved in the world's largest department store.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A celebration of capitalism in Midtown.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.