The remains of a 12th-century chapter house in Golden Gate Park.

Golden Gate Park's historic collection of plants.

This private residence was the template for one of the most beloved television homes of all time.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

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

Olfactory delights in San Francisco's Botanical Gardens.

There's nothing creepier than a cemetery next to a clown motel.

An errant donkey ushered in a new era of mining in Nevada.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

This Old West eatery along America's Loneliest Road was originally a stop on the Pony Express.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Singing sand that stands as the final remains of an ancient lake.

A land of debatable treasure.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

The most magnificent bottle house in a town strangely full of them.

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

Odd outsider art installations surround a Gold Rush-era ghost town.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

Only intact Ichthyosaur skeleton in the United States and an abandoned gold mine and ghost town all in one place!

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.