One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A battle between nature and architecture in the Cambodian jungle.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

The restored and active Victorian-era final resting place of San Francisco.

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

Nursery with extensive collection of flesh-eating plants operated by the author of "The Savage Garden."

Concrete strongholds stand guard over the Golden Gate.

A huge musical instrument played by the ocean.

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

The oldest lawn bowling club in the United States.

An overlooked and unassuming engineering marvel.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

Gold Rush-era tombstones line the park's paths.

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

The legendary statue-hating superintendent of Golden Gate Park is honored with... a statue.

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

The remains of a ruined mansion memorialize the 1906 earthquake.

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

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

The world's northernmost aquarium looks like it has fallen over.

The Origin of On the Origin of Species.

This one has sailed five times as far as Sir Francis Drake's famous ship.