One of the Seven World Wonders. This was a very cool experience. The ruins were very interesting, especially the pyramid. It was cool to be in the same spot that an ancient civilization once was, many many years ago. Only reason I gave it 4 stars is because it was SO hot and we were so tired, and our tour guide was boring. If we had just been able to explore ourselves the whole time and it wasn't so hot and miserable, it would have gotten 5 stars.