Get out of San Jose as fast as possible. Check out Playa Hermosa, Manuel Antonio, Volcan Arenal - Tabacon Hot Spings, definitely do some canopy tours, white water rafting.
Costa Rica is one of my favorite places in the world. I rent a car and drive all over the place, but watch out for the craters in the road. Get a 4 x 4 for sure.
Enjoy yourself!!
