This morning, head out on a guided tour of the Palenque ruins, one of the most impressive Maya sites in Mexico, set deep in the jungle.Later, you’ll visit Roberto Barrios, where turquoise pools and waterfalls make for a solid change of pace. There’ll be time to swim, relax, or just enjoy the setting before heading back.In the evening, board your overnight bus to Mérida. Grab dinner and snacks before you go, then settle in for the journey across to the Yucatán.