One of Oahu’s best snorkeling and diving spots was created by warm water discharged from the nearby power plant.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

Where else would a linchpin of post-colonial Native American cuisine anchor the menu but a museum?

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

A (slightly) grownup take on the classic retro arcade.

A daily replay of the experiment that proved the rotation of the Earth.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This giant disembodied horse head seems to balance impossibly on its nose.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The 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.

Country fans may flock to Nashville's music scene, but this Appalachian town is where the genre was born.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

One street divides a single town that stands in two U.S. states.

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

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

This beloved marketplace mascot poops money and grants good luck.

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

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

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Bizarre Cavern.

This free, take-a-book shop seems like a trick but isn't.