We recently discovered San Francisco City Guides' free walking tours last fall, which have been around for 30 years. They offer seasonally-themed tours throughout the year, including their annual Scavenger Hunt in the fall, as well as regular tours in various neighborhoods every day of the week.

Check out what tours are going on today and this weekend on San Francisco City Guides' front page. We're dying to check out City Scapes And Public Places, which happens every Friday at 10 a.m. and 1:30 p.m. And we're sure Gold Rush City is quite fascinating too.

There's a whole slew of tours happening over the weekend, including Mission Murals, Coit Tower Murals, Landmark Victorians of Alamo Square, and Japantown, Urban Renewal and Fillmore Jazz on Saturday. Sunday's walks include Theatre in San Francisco, Castro: Tales of the Village, Downtown Deco, and Golden Gate Bridge.

If you've been on any of the tours, let us know how they are!

We checked out the Nob Hill tour a few months ago, and learned all about the history of the railroad tycoons. Read more about it after the jump!