Tikal was my personal favorite. Just the height alone was staggering. How did they do it?
The first night in Tikal which is in the heart of the jungle we could here a deep breathing sound coming from outside in the dark. The next day we found out it was howling monkeys that were far into the jungle. They live in the tops of the trees and are very loud when you get up close. Steve took close up video with another camera. I will try to post a closer look later.