On the beach south of the popular resort town of Cancun, Caribbean Reef Club at Villa Marina is close to a live coral reef. It's a splendid spot for scuba diving or snorkeling. An hour's drive south of the resort is Tulum, where ancient Mayan ruins overlook the dazzling blue Caribbean. Play tennis, swim or fish right at the resort. Amenities include direct beach access, air conditioned units with partial...