The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

An ever-evolving wall of graffiti art off East Liberty Street.

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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

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

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

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.

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

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

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

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Secret gardens just a few miles from downtown Atlanta.

An underground magnet for ever-changing street art.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

A brick-paved former section of the historic coast-to-coast highway.

The largest collection of historical roller skates in the world.

An idle pastime becomes a record holder in Boys Town, Nebraska.

The Ozarks' strangest dwelling.