The second-largest giant sequoia in the world.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A hidden courtyard houses early 20th-century plaster masterpieces.

Three nine-foot-tall bathing beauties perched elegantly on life-rings welcome visitors to the Alki waterfront.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A very tiny church, bisected by a now-dead oak tree and marooned in the middle of a shopping center parking lot.

Make sweet music as you walk through this interactive sonic sculpture.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

Unusual white sandstone formations in the Los Padres National Forest.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

A family agreed to sell their property to Disney on the condition that this tree, planted as a wedding gift, would not be removed.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

A Saint Nicholas-themed ghost town in the Mojave desert.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

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

Tucked away behind an unassuming set of shops is a must-see series of stunning murals.

The Giant Lemon of Lemon Grove.

An abandoned World War II bunker is part of a chain that runs throughout Washington.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

The mysterious round rocks of Schooner Gulch.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.