My husband and I will be visiting Costa Rica for the first time. We have booked Christopher Howard's tour of San José and the Central Valley at the end of April. We will have two free days: Wednesday, April 27th and Monday, May 2nd. We would like to stay in and around the capital and find out more about it while having fun. Maybe do a couple of day excursions. I would be really grateful if someone could give me some tips on things to see and do in San José on those 2 days. I speak Spanish. Thanks in advance!