1. The City has a motto: ""Oro en Paz, Fierro en Guerra" (Gold in Peace, Iron in War) and it's not in Latin, it's in Spanish.
2. San Francisco can reasonably consider itself the coolest U.S. city. June, July and August temperatures (daily maximum, minimum and mean) are the cooler than those of any other major U.S. city.
3. Less cool: The homeless population is believed to be the highest of any major U.S. city (per capita).
4. San Francisco was founded by Spanish colonists on June 29, 1776 -- before the signing of the Declaration of Independence -- as a fort at the Golden Gate and a mission (named for St Francis of Assisi) a few miles away.
5. There are more than 50 hills within city limits, but the walkability score is still quite good -- partly because of several neighborhoods built using material dredged from the Bay.