A stop by Oaxaca's famous Tule tree on the way to (or back from) Mitla is a must. Located four miles east of Oaxaca, this enormous ahuehuete cypress tree is estimated to be more than 2,000 years old. It stands some 140 feet high and its trunk has a diameter of 138 feet. 

The Tule stands guard over the town of Santo María el Tule and is larger than the church behind it.