First, I just wanted to say a big "thank you!" to the poster who recommended Desafio Adventure Company in Costa Rica to me in a PM. Unfortunately, with the website upgrade, I no longer have access to my PMs from last year.
We just returned from an 8 day trip to CR with my 2 teens and had an absolutely awesome trip. It had to be the most fun and relaxed trip (logistically) in a long time, in big part due to the recommendation. If you are looking for adventure, this is the place to do it. The first part of the trip we did whitewater rafting, ziplining, waterfall rappelling and hiking in the Arenal area. I have done all before, except the rappelling and this trip exceeded my expectations. After the 1st half of the trip doing all the above, we rented a car and headed to Playa Hermosa to hang at the beach for the second half. Everywhere we went, the people were friendly and the scenery stunning.
I know this is a European travel forum, but if you would like to change it up a bit, I would highly recommend both CR & Desafio.
Thank you again!