Quepos - Activities?

Hello! We were suppose to go to Manuel Antonio Park tomorrow, but the park will be closed due to the heavy rain until Wednesday. Any idea of what we should visit for our day in the area? We have a car, we visited Jacò today and prefer to avoid touristy spots. Recommendations and ideas are very welcomed!

Also, any clue if we can get a refund or postpone the tickets we purchased for MA? Thank you!