Golden Gate Park's historic collection of plants.

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

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

A hidden subterranean installation offers a view of the sky.

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

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.