Calavera Cenote also known as Temple of Doom is the first cenote you will see on the Cobá Road 5 minutes from Tulum downtown. Cenote Calavera or Skull Cenote is one of the most beautiful cenotes in Tulum with a beautiful halocline at 12 meters. This special cenote gets its name from 3 circular openings in the roof of the cave, the two small ones resemble the eyes and the big one the mouth of a skull when viewed from above, so when you come you will disvover this amazing and perfect natural formations.