Fun fact: Sutro Tower is now one of San Francisco’s most emblematic landmarks, but it was not a welcomed addition when it was built in 1973. The hike up to this massive pitchfork is varied and somewhat challenging — hiking boots are highly advised, especially for some of the steeper parts. You’ll experience both sweeping vistas and wooded hillsides and a dazzling array of wildlife, all in the middle of the city. Bring a jacket! Wind is a constant.