My husband and I took a day excursion to Kohunlich while on a cruise to Mexico in 2010. This was the first Mayan ruin that I had seen and I was completely in awe. The carvings were magnificent and our guide was very helpful and knowledgeable. This is also a large Mayan ruin (over 20 acres) so if you go there you will be doing a bit of walking. Well worth it though!