We are planning a family vacation in May. I'm having a hard time finding things to do on Sundays in Cozumel. We're planning to spend the evening in the Plaza as other people have recommended. I'm wondering about the Punta Sur Eco Park. I'm finding confilicting info on whether it is open on Sundays or not. Does anyone know? Also, does anyone have any information on the lagoon tours in the park? I have only found one mention of it in a blog and I can't find anything "official" regarding availability and cost. Thanks so much!!!