When Lake Belton overflowed its spillway in 1992, Mother Nature carved out a huge canyon and created a wetlands below, now preserved as a natural area offering, hiking, bird-watching and wildlife photography. Miracle Mile, a fully accessible boardwalk trail, allows people with disabilities to view the wetlands and restored native prairie below. Open dawn to dusk. From I-35 take TX 36 N to FM 2305, then to the northside of dam.