high-performance antenna I was able to connect the WIFI internet signal located at the park welcome center (nearly a mile away)! Bandwidth was about twice that of a dial-up connection - slow but usable.
As we walked down into the canyon, our tour guide noted the dark stains on the normally tan limestone walls. The black color is from bacteria which is carried from the surface by water over the rock face. The sheltering from the water is the primary reason for the preservation of the rock images.
The rock paintings are sheltered inside the cavern-like walls of the canyon.
We both feel that Seminole Canyon State Park is definitely worth visiting.