This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A self-built castle made by a mysterious man.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

This bridge provides safe passage for squirrels.

The only Native American museum along the Oregon Trail, run by the peoples who have lived on the land for generations.

A sculpture of a salmon swimming through a brick building.

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

Inside a humble hangar is some of the best roller derby the world has to offer.

One of the world's tallest, oldest, and most disgusting chocolate cascades.

An institution that preserves the history of institutionalization.

All aboard the world's longest miniature railway.