There is not much information on this sinkhole other than that it is a swimming hole for locals.  I was able to free dive down to 60 feet of depth and as I followed the wall, I could see some formation as I went down. There is no map of the sinkshole and I did not see any rivers leaving the sinkhole so the water might be static.  I am curious to look into if artifacts would be at the bottom. 

 Here is a video of divers travelling around at the bottom of this sinkhole. Diving at cenote Azul in Bacalar - YouTube