sentences:  The namesake features of the park are the scenic upper and lower falls along Onion Creek.Bald Cypress, sycamores and pecan trees line the banks of Onion Creek and live oak, ashe juniper, and mesquite can be found on the drier uplands.Other trees found in the park include Wafer Ash, Red Oak, Texas Persimmon, chinaberry, Cedar Elm and Mexican Plum.