When going to Huatulco, don't forget to visit the Turtles Museum. It’s a sanctuary where turtles are grown. There are about 20 different species of turtles. While you visit there, you can feed them or watch how they behave. They teach you how important it is to preserve them, because most of them are threatened with extinction.
On your way to the Turtles Museum , you can make a quick stop at the "bufadero." It’s right in Puerto Angel, about 30 minutes from Huatulco. There at Puerto Angel, you can have some good seafood, and for those who like surfing, Puerto Angel has the best beaches in Mexico. I really recommend you try it.