The oldest farmer's market in America is so ancient it was approved by the King of England.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Dr Barnes' $25 billion private collection of art and arboretum.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

World's first "penitentiary," meant to be humane, drove men insane.

A bronze monument to Cleveland's favorite, fastest son.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

This North Carolina store preserves a historic moment in America's movement for racial equality.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

A graffiti Mecca welcoming artists from around the world.

An easy to overlook storefront hides some of the most authentic and regionally diverse Chinese food in New York.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.