The Rio Secreto, Playa Del Carmen’s very own underground river, is a rare sight. As such, don’t hesitate to check it out while you’re in Mexico. The entire family will be provided with wetsuits and water shoes prior to the excursion, though be aware that no one will be allowed to bring a camera or other electronics on the trip. Once you’ve suited up, a guide will talk you through the underground journey, allowing you to climb and wade around in appropriate areas. Afterward, the entire group is treated to lunch.