The road leading inland from Puerto Morelos has just one thing on its mind: cenotes. Sign after hand-painted sign exhorts you to visit Cenote Las Mojarras! Cenote Boca del Puma! Cenote Verde Lucero! Without prior information, it’d be impossible to know which to choose, so we made sure to get a recommendation. And those we talked to were in agreement that Cenote Siete Bocas, or the Seven-Mouth Cenote, would be unforgettable.