When I was a kid we were always driving by marshes. We could see them from the car as we zoomed by from the highway. There was this one that, in summer, was covered with a thick green algae. Every time we drove by my brother and I would yell: "Sliiiiiimmmmee Piiiiiiiiittttttt!"!!!!!! It was one of the highlights of our young lives. -- I pass by this lot (the one pictured) fairly often. When it's too late to take BART or I just feel like walking home. There are these amazing islands of tall grass that grow out from the cement, they remind me of cattails. I guess this is my urban marsh. I'm sure it will be developed soon, but till then, I'll always enjoy looking down into it from the street... a little wild wasteland in a highrise jungle.