A wild west land agreement was etched right onto this historic Idaho stone.

A black cottonwood gets a second life as a home for books.

A giant milk bottle from the 1930s beckons drivers to this diner.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

A stunning landscape of bunkers that once stored chemical weapons.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

One of Philadelphia's largest murals resides hidden under this bridge.

The humble field where the first Major League Baseball game was played.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

A legendary boxing venue and ring featured in Rocky V.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

In the early 1800s, surgery was also a show.

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

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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.

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

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

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

Statue commemorating the use of ether in anesthesia.