Xcaret Eco Park has their own Xcaret website and is the oldest of the commercial eco parks in the area. The entrance fee is $40, but its Disneyland style has a lot to offer, if you don't mind the crowds. Of particular interest: sea turtles hatchery, aviary and bird breeding program, mushroom and orchid farm, and a butterfly garden.

Xel Ha Eco Park is actually a Mexican national park, marketed as "the worlds largest aquarium". Xel Ha has organized and commercialized 22 acres of lagoons and cenotes for snorkeling. It has become one of the states largest tourist attractions and the most well known snorkel site in Mexico. The park is commercial, however, entrance fees help to fund conservation in the park. It is well priced at $15 and a good place to learn to snorkel since the lagoon is sheltered from the ocean's waves.

Xpu Ha Eco Park is the newest of the bunch. It is billed as an "all inclusive" and your $40 entrance fee includes snorkel gear, food, and other amenities. It is already sort of run down and smells funny, so Xcaret is a better bet for your money.

Tres Rios Eco Park focuses on the jungle paths and three rivers in the park with canoeing, horseback riding, and bicycling. Entrance is about $20.

Caribbean Coast Travel can set you up with tours and transportation to all the popular Mayan Riviera destinations.

Place of Mirrors A woman travels through Mexico to the lost Mayan civilization in hopes of uncovering clues about her own past life.