Central Valley Eco Lodges Arenal Observatory Lodge sam, January 20, 2012February 26, 2013 Location: La Fortuna Price: $67-$452/night Features: river, waterfalls, guided trails, volcano, lake . Dramatically perched on a ridge of just 1.7 miles from the Arena Volcano in a private nature reserve, Arenal Observatory Lodge was originally built in 1987 as a Smithsonian Institute scientific research station. The La Fortuna located… Continue Reading