This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A super-sized promotional trick that is now a D.C. landmark.

Remnants of a storybook amusement park hidden behind a strip mall.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The United States Capitol's former columns still stand.

Art deco landmark on the outskirts of Washington, D.C.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

First planned industrial community in the United States.

An enormous park-like oasis, full of famous Chicagoans' graves.

A hot dog stand where the heads are just as hot as the dogs.

One of the last functioning antique elevators in Chicago.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

The 606 is a decade in the making.

Beloved bar home to musicians of all eras and reputations.

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

The world's largest drain sits below the city of Kasukabe, Japan.