Grab a cab to the Chanakaab National Park, it's only about 5-10 minutes away and cab ride for whole car would be about $20.00. Once there the entrance fee is $10.00 per person (probably less expensive for kids) but it is totally worth it. Huge long beach, I know that you not beach bums) but there is a paved path to walk along the beach - there is a lagoon perfect for introducing children to the water without fear of undertow, etc. There is a Sea Lions show, a mini ruins exhibit, a plant and lagoon area that is beautiful to walk through, a Dolphin Sanctuary which people are swiming with the Dolpins on tours, restaurant, gift shopping, showers, locker area, etc. It's perfect for those with kids and want a Caribbean feel while not being just dropped off at a beach someplace. I highly recommend it!