Walked around the port for a little while, then decided to take a taxi to Coki Beach on the other side of the island. It was a thirty minute ride through many different neighborhoods and up mountainsides overlooking the light blue sea. The driver charged $50 pp round trip. At the beach there are many little local kiosks selling beverages, food, and snorkel gear. The beach itself was pristine and situated in a small cove surrounded by hills and sheer cliffs. Snorkeling was comparable to Hawaii and I saw hundreds of types of fish including a bunch of flounder. The water was so clear the bottom was visible even at great depths.
Took a local tour of El Yunque rainforest. It's about forty minutes outside of town. Once we arrived we had about two or three hours to explore the trails featuring three large waterfalls. The rainforest was beatiful and well worth the strenuous hike. The tour took us back to Old San Juan where we walked around and checked out local shops and restaurants. The driver also took us to the Castillo de San cristobal for a short time for pictures.
We found a local bar to relax at one the beach past the main tourist/margaritaville area. Beers were much cheaper down there and the loungers and umbrellas were free as long as you were drinking something. Snorkeling gear could be rented for $8 for the day, and the reefs were beautiful but not quite as stunning as St. thomas. Islanders very friendly.