This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

This spectacular track has run continuously since 1882.

A hotel with a rich Wild West history of miners and bootleggers.

Colorado's only true geyser is hidden within the San Juan National Forest.

A recreation of an Old West apothecary full of curios.

One of the most unusual geological features, recognizable from a dozen hit movies.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Golden Gate Park's historic collection of plants.

An unreal vintage shop that wears its dadaist influence on its zombie fish.

Hundreds of trees made from glass bottles make up this forest on Route 66.

A modern day curiosity cabinet.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

An eclectic trailer park retreat in the middle of the California desert.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

One of the last free public hot springs is decorated with hippie art.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.