San Francisco is a beautiful city with lots of things to see and enjoy. If you just want to know about the city briefly and quickly, doing a city tour is a right option for you. Within 3-3.5 hours, you get to know a lot.
With professional tours for a limited time, it works better for me that we do spend a lot of time at one spot. After knowing what all things are available and where to go, you can make a plan for next day if you have time to visit that specific place to explore more or spend more time at interesting places.
Golden Gate Bridge, Twin Peaks, Victorian houses, Alcatraz, cable cars are few of some major attractions in San Francisco.
If you are in downtown SFO, do visit Homeskillets American eatery joint on 6th and Mission in downtown San Francisco.
The guide in he paid city tours give you lots of information about the houses, the fire that burned down major part of the city years ago, civic center, cable cars, happening markets, food joints, etc. which is good to know. Although I am not sure how much I remember now.
An interesting fact about cable cars I learned is that there’s a moving cable in the middle track of the three tracks laid for cable cars on the streets of San Francisco, that continuously moves and the cable cars just hook it up to get into motion. This is why cable cars, do not have engines nor do they need fuel. Also, they move at a constant speed since it is dependent on the speed of the cable that is constantly moving.