I am a lucky man: I have been to Chichen itza!
Sadly it was raining and I only managed to take 26 pictures of the pyramid :(
But as I am the author of the PhotoSynthToolkit I have merged together 10 synth of the pyramid.
Enjoy the full synth of the pyramid: http://photosynth.net/view.aspx?cid=3e2a7844-e6ee-422e-9187-6f82ca63754b 625 pictures!
I also have recently released a Google Chrome extension that replace the Silverlight viewer by a WebGL one using Three.js: https://chrome.google.com/webstore/detail/jnnhdiolpfgjbgagkbmdfidfofancmee (give it a try :)