It's a city of many icons: Golden Gate bridge, Alcatraz, hills, white houses, beatniks, hippies, cable cars, steep streets, memorable chinatown, fog and many more.
Mild weather all year round would be perfect for visitor or someone looking for a nice place to live:
What is your favorite travelling book? One of my top three would be "The Dharma Bums" by Jack Kerouac.
The action takes place in mid 1950's in USA and features some of the brightest beat generation characters (it features famous Alan Ginsberg reading of "Howl" poem).
It's a great dose of adventure, hitchhiking, nature and simplicity. Here's one of my favorite quotes:
"Think what a great world revolution will take place when … [there are] millions of guys all over the world with rucksacks on their backs tramping around the back country…"
Make sure to find some extra space in your backpack and take it with you! :)
Long story short: guy named Simon and his father in law builds a low impact wooden house, it takes 4 months and £3000 and the effect is fantastic place to live which looks like hobbit hole. It has features like solar panels, fridge cooled by air coming from underground and water from nearby spring going down the hill.
Check out his website for plans, pictures and more info!
Those geothermal remains are just blurry footprints of powerful supervolcano eruptions. Today Yellowstone Caldera (aka Yellowstone supervolcano) is still considered an active volcano. Could you image how another eruption would look like? (hint, caldera is about 34 by 45 miles, 55 by 72km).