Thuburbo Majus, Tunisia. Built by by Petronius Felix in 225AD, the grounds of Palaestra of Petronii were the gymnastics area; wrestling and boxing would have been performed here.
It was a late autumn afternoon when I took this picture and the sun was blinding and low in the sky. I had to heavily tone map the image to correct for the washed-out sky/clouds (if only I had taken multiple exposures!), but think I did a good job of rescuing the image.