Rusty Things and Firepits

We found these on our walk by the river. I think I've taken a picture of those springs before, but they sure weren't there by the large rusty pipe. I guess either the current of the water moves things around or someone picked it up and put it there. I also found this little firepit someone had made in the riverbed. The river has been low for a few months and someone may have made themselves at home with a little fire to warm them. I didn't know you could do that, but people do lots of things they aren't supposed to do.