This is one of the largest pyramid complexes in Mexico - but it has trouble competing with Teotihuacan for attention. There are buses from Terminal Sur - but returning may require hopping on a local bus to Cuernavaca and then buying a Pullman ticket (transportation to Teotihuacan is a bit more straight forward).
There is a very modern and relatively new museum -- you have to start here as this is where you buy your tickets. Then you walk the cobblestone path back to the gate to enter the pyramid complex and you can climb up just about every structure (but don't stand the walls!). There are iguanas but there are not peddlers trying to hawk bracelets, clothing, hammocks and any other number of things you'll see sold on the grounds at Teotihuacan or Tulum.
These are the QUIET pyramids. There are far fewer visitors here and it's much more mellow. Bring a book and a camp chair or a blanket and relax, photo stalk some iguanas, watch the clouds change. Bring your own bottle of water, too - there's a small kiosk behind the bathrooms outside the the gate to the ruins but you're on your own for lunch and drinks here. read more