My husband and I travelled around Belize last February and the caving trip to Actun Tuniche Muchnal was one of the highlights. You can go with a registered tour guide from St. Ignacio. This is a full day trip and involves some effort but the Mayan ruins inside the cave will make it all worthwhile. Don't miss out!! We also did a day trip to Tikal and really enjoyed it. One day there was enough for us. Some people do an overnight trip and see the sunrise over the ruins in the jungle. Either way, Tikal is a must see!!