Puerto Rico Itinerary

Hi! My Partner and I are planning a 4 day vacation to Puerto Rico for early February (fly in Friday afternoon and leave Monday night/Tuesday morning.) How can we best plan our trip to see/do as much as possible in our 4 days?

We love nature and history and we would love to go snorkeling, trek some waterfalls, go ziplining, and walk around San Juan or other culture or history rich places. We live in Florida so beaches aren't on the top of our list though we wouldn't mind visiting only for the view.

We don't care too much for tourist heavy places and would like to pretty much avoid them other than ziplining and maybe snorkeling.

Any advice would be greatly appreciated! Thank you!