A collection of 20th-century automata, penny arcade games, and musical contraptions.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An alley covered with 20 years of bubble gum.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

San Diego's most historic and haunted home.

North America's largest accredited model railroad museum.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Historic funicular railway, believed to be the shortest railroad in the world.

The legendary building that needed ghostly approval before being built.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

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

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

The magic's in the hole!

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.