Quite simply the largest tree in the world (by volume).

Four hundred granite steps were built into this massive rock by the National Park Service.

Hidden in a hotel parking lot is a strange historical plaque erected by an obscure fraternal society.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

A dentist's hated concrete colossi are now beloved icons of the community.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

A classically inspired temple in Redwood City.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

This massive redwood tree has a hole in the base big enough to drive through.

The first safe in this California town had to hold all the gold.

Giant jewel-toned statues fill the grounds of this Cambodian Buddhist temple in California.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

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

A classic advertising icon immortalized in regal bronze.

San Francisco's newly reopened hands-on science museum.

One time home to turn of the century explosives, now hidden under the Bay Bridge.

A crumbling Beaux Arts monument to the Bay Area's age of rail.

This small oasis of flora and art was created in remembrance of a local auto business owner.

A plaque outside the San Jose airport commemorates the insect's arrival to the West Coast.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.