A monumental cross hides in the trees in Golden Gate Park.

Home to one of the world’s largest collections of model yachts.

Perfect your fly fishing technique on their practice ponds.

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

A miniature view of the park, caught in time.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A 140-year-old castle with underground caves hidden in San Francisco.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

A living antique aviation museum in the historic town of Red Hook, New York.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

These subterranean storage areas hold emergency water reserves.

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

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

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.

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

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Its buzzing collection honors vibrator history.

A winding path built in secret on the edge of the continent.