These sprawling mines once served as a source of plaster and today serve as a storage facility.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

This museum remembers an apocalyptic cult that became more famous for baseball than religious radicalism.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

Tour the sci-fi-esque reality of governmental disease management.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

Jacksonville's highways rendered this century-old grammar school unusable.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

The art and history of the velvet painting are on full display in this Los Angeles museum.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

These machines have been collecting dust for decades.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

Gigantic private toy museum featuring among finest collections of antique mechanical banks in existence.

Portlandia is the second-largest copper repoussé statue in the United States.

Their motto is, "We've been bonkers for hats even longer than you have!"

An emporium for the weird, creepy, rare, and just plain gross.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

With the touch of a button, you can read a randomly selected short story.

San Francisco's first World's Fair, dedicated to the wonders of California.