There are several archealogical sites throughout Mexico. Chichen Itza is one of the largest. The resort offered tours to Chichen Itza, but we chose to drive ourselves. We didn't save any money, just time. The toll for entering the Yucatan is about $20 and entrance fee to Chichen Itza is about $30 per person. The drive took about three hours. We had no trouble finding it with a map.
Once inside you have the option of getting a tour guide that will explain things as you go through. They carry different color feathers that represent the languages they speak. There several ruins at this site including the ball court, the temple of warriors, El Castillo (the pyramid in the center), and the Cenote (sacred wells where the Mayan people made their sacrifices).
We climbed to the top of the pyramid, where the view was spectacular. The stairs leading up the pyramid are very steep, so climbing down them was much more challenging than the climb up. There is a rope in the center of the stairs to help you climb down. There is a staircase inside the pyramid that you climb. It leads to a small room near the top of the pyramid that contains some artwork and statues. In November it wasn't too bad, but we were told it gets extremely hot and humid in the summer.