We had a great hike to swim in a waterfall in Uvita, but forgot to take a spare set of camera batteries there with us. So you'll just have to take our word for it that it was big and beautiful, and that we saw a nest with baby hummingbirds in it on our way there.
Our hotel in Uvita was Los Laureles. The folks running it lived in Frederick, MD for 9 years -- it gave us quite a chuckle to meet a guy in Costa Rica who went to high school down the road from our friends in Frederick. This was perhaps the nicest place we stayed -- with a real bed, A/C, a hot shower, and even a little fridge, which was really nice, because Uvita is really hot. Plus they had a bit of land, on which we saw toucans, trogons, morpho butterflies, and a sloth. They're 2 km from the beach, but closer to the waterfalls. I think I'll take that trade.