I did go to the web for parks in Beaumont and there is Sprott park, Libera Park, Live Oak Park, Montrose Park, Alice Park, Adams Park. The web didn't give how old they are or if permit is needed. Hope someone from there can answer and save me some time and tell me which are safe.
Besides the parks, there were a few ferry crossings on the sabine and neches rivers in the 1800s. Some of these were located on roads that are still used today.