Visiting the ancient Maya ruins at Chichen Itza is like taking a step back in time. This is one of the largest archeological sites that tourists can visit in Mexico and the grounds are spread out over 4 square miles, so you'll want to take as much time as possible to truly take in the whole experience and walk the grounds to each site in the area. There are 2 ancient cenotes where the underground rivers have joined to create a fresh water pool. The towering pyramids create dramatic photos at any time of day. We recommend taking a guided tour and buying an informational map of the site so you understand the nuances of the ancient Maya civilization.