Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

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

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Here, visitors can swing with the waves of the Pacific Ocean.

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

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

This quirky roadside attraction dives into the many theories surrounding North America's most infamous hairy cryptid.

Anyone can control this glittery light installation with just a phone call.

Golden Gate Park's historic collection of plants.

Tiki luxury on Nob Hill.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A psychedelic labyrinth on the San Francisco bay.

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

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

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

This giant shopping mall still holds signs of its automotive past.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

This quaint archive of the silent era preserves and pays homage to a seminal moment in film history.