Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

Beautiful stained glass depictions of the history of human flight fill this surprising chapel.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

A terrific purveyor of natural history objects and curios.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

There must be a pun in this haystack somewhere...

Commemorating the spot where the famous scientist fed his pigeons.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Avoid gangster interaction while window-shopping.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

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

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.