This is my first post but have enjoyed reading the suggestions here. I am leaving tomorrow for Playa Del Carmen with a group of 6 women aging in range from 20 to my 75 year old mother. We are staying for 5 nights at Iberostar Quetzal. Would like to relax most of the time but would like to take one excursion. Considering the age of my mother who is pretty active but still is 75, I was wondering if anyone had a suggestion for an excursion. We were considering Tulum/Xel-Ha trip but we were not sure, other than snorkeling, what you do at Xel-Ha (mom mom doesn't swim and has had skin cancer so needs to stay out of the sun as much as possible). Also heard that Tulum is not as impressive as Chichen Itza but we are not sure we want that long drive or the amount of heat and walking required there. Any advice? Also, weather forcast looks awful on the weather channel, can we really expect thundershowers for four days or are these more like pop up showers, not all day rain outs?