Golden Gate Park's historic collection of plants.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

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

Once the site of speeding horses, now home to picnickers and public concerts.

A quiet marker in memory of local men and women lost in WWI.

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

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

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

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

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

The remains of a ruined mansion memorialize the 1906 earthquake.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

A giant chess set, minus the psychedelic drug trip.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.

A Roman-inspired temple once controlled half of San Francisco's waters.

A breathtaking 19th-century trail overlooks Lake Tahoe.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).