Dunn's River Falls was amazing! Bring water shoes or you'll have to pay $7 to rent them. It was a great experience. Went on a small tour of part of the island. Very poor, lots of desperate people wanting to make a buck. Will do anything for your money including begging, back flips or selling you junk. Bob Marley was around every corner.
Tendering is done by a local company. Island is first world compared to Jamaica. People were nice. Went on a Catamaran to Sting Ray City and had fun but I question the environmental impact of what is going on there. Did some snorkeling and again, seems like the coral is being killed by careless swimmers. Rained and got cold.
I went to Tulum while my husband and son swam with the dolphins. Tulum was a great site and we didn't have enough time there and definitely worth seeing. Watch out for the vendors. I didn't bargain very well and realized later I paid way too much for the vanilla and a silver necklace. There seem to be American prices for everything. Tacos at Tulum for example were $8 but I'm certain the locals pay only a fraction of that.