This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

2300-year-old Roman road connecting the empire.

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

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

Yo, Adrian!

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

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

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.

An annual extravaganza of Broadway theater memorabilia.

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

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Slyly buy a shake in the Parker Meridien lobby.

A very classy 1920s-era bar right in Grand Central Station.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Read a book next to a Midtown waterfall.

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

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.