This pyramid is today hard to notice at first, because vegetation grew all over it, and parts were excavated to build other things, notoriously an imposing asylum in the early 1900. You will first go into the tunnels (not original): kilometres of them exist, and you should hire a guide (not expensive) because if not there is no way of enjoying this mysterious way. Definitely not for claustrophobic people! Afterwards, you will emerge in a field full of ruins of pyramids, where you may let your imagination run free, in order to recreate the imposing scenes that once took place there. Don't miss to experience the "bird sound" phenomenon, in the middle of the big stones. End this visit by climbing the rebuilt side of the pyramid... but carefully. The handicraft fair below is scarcely interesting. Climbing to the little church in the top of the pyramid is worthwhile, but mostly for the views it features.