Cenotes are sanctuaries, and the site qualifies to be a mixed one. Complementary sites could be included in the buffer zones, too. It's unfortunate though that other sites in several Tentative Lists have been removed, so it is understandable that the peresquites change. Increasing the list of delisted sites should be considered, and maybe even the option of broader transnational parameters. Of course, UNESCO has to allow for a broader debate, true to its Specialized agency status, but that shouldn't impede the inclusion of more adequate membership and even agents that remain truthful to their conditioned situation as citizens or ex profeso nature.