The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The most decorated dog of World War I is preserved in the Smithsonian.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

A plaque and memorabilia collection mark where A&W got its start.

A 90-acre park on former landfill that hosts an annual kite festival.

The only visible piece of San Francisco's most famous shipwreck.

The oldest lawn bowling club in the United States.

Over 315,000 preserved amphibians and reptiles in jars.

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

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

San Francisco’s condensed garden of incredible plant growth.

This turn of the century masterpiece has a mysterious goaty interloper.

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

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

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

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

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

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

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