DO NOT MISS TIKAL. It is a 1-1.5 hour trip into Guatemala. Border crossing is very easy. You can arrange guided tours at Eva's that go in those small vans. We just hired a taxi driver for the trip, paid the same as a tour and got to set our own schedule. Tikal is huge. We walked around for 6 hours and did not see all of it. Also the coatimundi and wild turkeys (very colorful, not like ours) are used to people so you can get really close. I do remember hearing that there might be some problems/restrication in taking a rental car into Guatemala, so be sure to check on that if that is your plan. Tikal is a full day trip.