Essence, the hostel with a view
We stayed three nights in a beautiful spot, near the small town of El Castillo, at the foot of the Arenal volcano. The hostel is called Essence. They have an amazing location with a view of the volcano and the lake beneath it. They serve only vegetarian food, with a lot of the veggies coming from their own organic farm just a few minutes walk from the hostel. They have big tents that you can rent, with terrasses and a view, but we stayed in a room with proper walls, protecting ourself and our gear from the rainy season.