nostr:npub197yhk8lcnh93knysghvts9facufcvuaej4zcqgpu4whnt62ypcrqsjgdx0 It is indeed a discarded bicycle tyre. This is an artificial lake that's been drained to turn it into a rainwater retention basin with a small stream flowing through it.

When they drained the lake, all the trash that people have thrown into it over the years emerged. There also some shopping carts in there.