N.
I was born and raised in Puerto Rico, and I can tell you that it's a beautiful island. While San Juan is great, you should definately make it a point of going to Fajardo. It is in the East coast of the island. Once you get to Fajardo, take the Ferry boat (check schedule before hand) which would only cost $2.00 and go to Culebra island. The beaches are absolutely gorgeous. If you need more places to go to (which there are plenty) feel free to contact me and I'll be happy to provide you with exact places and info.