The Monatiquot River in Braintree, Ma is a dirty, polluted river. Infested with PCBs and fertilizer run-off from the Braintree Municipal Golf Course.
It winds through Braintree almost unseen. Most people don't even realize the river is there.
In addition to the chemical pollution, shopping carts end up at the water, abandoned. The city removes them periodically, but they always return.