Caracol was a major player in the Maya World.
Flora and fauna
Arrange a tour in San Ignacio. The roads to get there are not always in great condition. So if you decide to drive your own vehicle, make sure it can handle mud. You will have to check in with the military before entering the park. Ask around to find out what time they let un-guided people pass. I believe it is only at 10am. There is also a set time you have to leave. All this is moot if you have a guide.
Stay in San Ignacio (Cayo)