Elevated freight railway turned wildly successful urban park.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A wall of chewing gum moonlights as collective art.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

An collection of Chinese propaganda posters from 1949 to 1979.

Oakland's beautiful monumental cemetery.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A classically inspired temple in Redwood City.

This replica of the Greek structure is in the heart of Nashville.

A 90-acre park on former landfill that hosts an annual kite festival.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Amazing meticulous gardens of personal wood carvings, Hydrangea, Canna, and many other flowers.

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

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

A huge musical instrument played by the ocean.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A spiritual vortex among the red rocks in Sedona.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.