Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

Illegal drag racing two stories beneath Chicago’s streets.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

I Street Bridge is the heaviest swinging center bridge in the United States.

Art Deco stylings conceal the true nature of this bridge.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

Concrete strongholds stand guard over the Golden Gate.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco's first World's Fair, dedicated to the wonders of California.

San Francisco’s century-old Christmas Tree.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

Early prototype for Frank Lloyd Wright's Guggenheim.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

Haunting and beautiful trees, doomed to die.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The unbelievably opulent home built for an infamous newspaperman.

The San Andreas Fault spectacularly offsets this creek.

This California estate was either haunted by ghosts or the Marx brothers.

A cobblestone alley with an interesting past.