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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A massive sea stack famous for its appearance in The Goonies.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A hidden alley in urban Baltimore is a haven for graffiti artists.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A sculpture of a salmon swimming through a brick building.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Former villa and estate of James Deering developed to preserve native tropical forests.

An underwater city for the dead.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Where America's first doomsday cult awaited the end of the world.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

A bright little alley in La Boca is a part of tango history.

A beautiful young girl said to have been buried alive in her coffin…

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.