We just returned from the Iberostar Maya and took a fantastic tour. The tour company is called Edventure Tours out of Tulum. You can contact them and view some of their pictures on Edventuretours.com.mx. You decide how you want to spend the day. We chose to zip line, snorkle in cenotes, ocean (we even got to see a shark), lagoon, visited with monkeys and had a wonderful lunch. We have been to Mexico several times and have done many tours including Excaret, Alltournative, Fat Cat and Jungle Cruise and this was the best BY FAR. I cannot say enough about this tour and Eduardo. If you have any questions, feel free to ask away.