In may 2016 I had experienced one of the best spots for diving along the Mexican Coast. Cancun has a underwater Museum named MUSA. It is very original with several statues and concrete creations laying on the bottom of sea. This is located close to the "Isla Mujeres" and nearby has a small colorful reef region filled with fishes, morea and lobsters. Very nice place to learn to scuba dive... Flat ocean (protected by the island), close to inland and shallow and hot sea water. The video speaks for itself.