Here are a few pics of some of my daily hauls from neighborhood fruit trees in Berkeley. A huge bagful of loquats or plums each took about 10 minutes to collect. I had to stuff myself with fruit all day long to keep from letting them rot. These are both great fruits for canning, but I prefer them fresh. Especially loquats, they are so good. And I seem to be the only one to collect fruits around here. Most of the fruit falls to the ground and rots. I did a little climbing to collect efficiently, but anyone could clean up on fruits in the neighborhood in the late spring and early summer.
Here is a cool website that maps the location of fruit trees in urban areas across the world.:
It was invented in the SF Bay Area, so the data are especially rich here.