Chichen is awesome a place that you absolutly should visit, much better than tulum (although tulum has a great great beach...) but my recomendation is dont do this trip until you are 40 or something...You are in the spring break, dont spend a minute in a cultural trip...you´ll have a lot of chances to go with your couple and childs in the future...catch every minute partying in the spring break... :lol: