Considering the Casa Ixchel in Isla Mujeres?
A VT member wrote the following comment about visiting Isla Mujeres:
Swimming and snorkeling by Pat&ZoAnn
Since Garrafon Park was closed during our visit (hurricane damage), we went to the privately owned property next door, Garrafon de Castille. It cost $30.00 MXN to get in, and you can snorkel right up the Garrafon Park boundary. There are also tables with umbrellas, loungers, and a bar. Snorkelling gear and fish food are also available, for an extra cost. You really have to try snorkelling with fish food. It almost seems like you're in a school of piranhas