Beautiful National Rainforest. It contains many beginner friendly trails for hiking and I would absolutely recommend bringing a bathing suit for the water falls along the way! You can also book separate ATV or horseback riding tours through the rainforest
Though it use to function as a market, it now functions as restaurants during the day and a two tier haven for the bar scene in the evening. If you're looking for good music and an even better time after 7pm, check this place out!
A fort built by the Spanish settlers starting in the 1500s, this is an awesome piece of history to explore. At only $10 and located right in Old San Juan, it is a great spot to hit before going out for lunch or exploring nearby scenery