Mayans and their pyramids and Easter Island with their Moai.
It seems quite silly for an entire people to not know they need to save some wood for more important things like food production.
The comment to which I am replying to has been removed, but I am going to paste my answer as a separate comment. The articles I link to I have uploaded to Dropbox out of convenience because one of them is behind a paywall.
Jared Diamond is not well regarded by historians or anthropologists. In fact, his work has been refuted a number of times by a number of scholars. A whole book was written by historians and archaeologists to refute his claims in Collapse.
McAnany and Yoffee (2010) is the opening chapter to that book and coupled with Tainter (2006) gives a great overview as to why societies "collapse" and deforestation is not the primary reason in either case. First of all, neither group collapsed. Easter Islanders continued to live and thrive on their island well until the 1700s when Europeans arrived. It was the introduction of European diseases which truly decimated the population. What stopped the statue building was not lack of trees, disease, or a loss of population. What stopped the statue building was the outbreak of warfare and it was warfare which caused a lot of instability on the island such as competition over agricultural land and resources.
As for the Maya, I have covered the topic previously, but I will reitterate what I had written. The "collapse" of the Maya was more of an abandonment of a region. The people living there simply moved closer to the coast or further into the Guatemala highlands. They very much continued to live, thrive, and prosper. One of the largest Maya cities, Chichen Itza, was a Late Classic to Early Postclassic city and its successor, Mayapan, carried on that tradition until the 1480s when internal strife caused the city to largely be abandonded.
As for what caused the Classic period collapse, deforestation may have been one of many reasons for a very select few areas. The same goes for drought, warfare, political and religious instability, and changing economic patterns. The reality is, all of these things factored into the abandonment to varrying degrees of severity. No one cause can be singled out as The Cause. Many Classic period cities continued to thrive after the abandonment only to be later abandoned in a few centuries. Some groups even left Classic period cities and then came back and reoccupied the city and surrounding area.