Ever wanted the laymen's version of your credit card fine print?

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

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

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A second generation sun-powered marvel lights up the night.

Golden Gate Park's historic collection of plants.

A 300-ship graveyard, with a few still visible at low tide.

A modest reminder of treacherous waters at the Golden Gate.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Haven for Cape Fur Seals, until the Ring of Death of jumping Great White Sharks arrives.

The loneliest plant in the world resides at the Durban Botanic Gardens...mostly.

Catacombs turned marketplace.

Hear the quietest sound from across the dome.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

The clever workshop that has been designing some of the most unusual coffins imaginable.

Macabre astrological automaton clock dating to the late 1400s.