The land owners are Felipe and Irma Fernandez. The maximum depth for the Blue Abyss Room is 225 feet/68.6 meters.
Cenote Pet Cemetery got its name from cave explorers Mike Madden and Eric Hutchinson who when finding and surfacing in the cenote for the first time during a cave exploration dive on October 12, 1994. They were searching for a connection between cave systems Dos Ojos and Nohoch Nachich where they found many animal bones laying in the cenote, thus Mike named it Cenote Pet Cemetary. In addition, the cenote was first discovered in 1985 after Hurricane Elena as the Mexican Army was accessing the damage by air and came upon it. The landowners have renamed area the Cenotes Sac Actun.
The most popular dive is to the Blue Abyss from Cenote Pet Cemetary. This room was first discovered during exploration dives of Christmas week of 1992 by Mike Madden and Bill Main. They found the top of the room as they had reached their air turnaround on their final day of diving. Returning on Tuesday, February 2, 1993 using Mako DPV’s from Cenote Nohoch Nah Chich, Mike Madden and Steve Gerrard explored the room to a depth of 225 feet/68.6 meters stopped by breakdown rock. Several attempts were made during the years since by a variety of cave explorers. It is currently being pushed by Polish cave diver Krzysztof Starnaweski.
Drive to the entrance road to Cenote Dos Ojos (The Ejido Jacinto Pat) located ½ kilometer south of the Xel Ha Highway 307 Bridge. Drive west on the Ejido Pet Cemetery sascab road. Follow the road past Cenote Dos Ojos and continue for three more kilometers. When the road turns left follow it south ad continue. Along the way you will see several huge concrete block signs with Sac Actun painted on them. Continue on road until the very end. You will find a large parking area marked by a cave diver sign and several long wooden tables for setting up your equipment. Park your vehicle.
It is highly recommended to do this dive to the Blue Abyss Room with a stage bottle. Why? For most folks, when you reach the Blue Abyss you will be close if not at THIRDS with your air or gas supply. The stage bottle insures that you have plenty of air or gas to enjoy the Blue Abyss Room, particularly if you plan to swim deep into the bottom of the room. Enter the water and perform the pre-dive rituals. Face the cave opposite from the wooden steps and deck and swim underwater into the cave. You are looking for a yellow braided nylon guideline. This line is set up as an irregular circular path that winds around a huge cavern and snorkeling area. There is a huge air space with two wooden decks and a ladder leading to the surface through a small shaft. Electrical lights have been installed for snorkeling groups.