After some early morning birding and photography and breakfast, depart for Arenal Observatory Lodge. Arenal Observatory is the only eco-lodge situated between Lake Arenal and the massive Arenal stratovolcano, and the only hotel within the boundaries of Arenal National Park. Set on a ridge amid towering pine trees on the south side of the volcano, the lodge offers seven miles of well-maintained trails on more than 800 acres. It is a birder's paradise, with more than 400 species being recorded here. Some of the more spectacular local residents include the Three-wattled Bellbird, Fasciated Tiger-Heron, Laughing Falcon, Red-lored Parrot, Great Curassow, Northern Jacana, Steely-vented Hummingbird, and Keel-billed Toucan. There is also plenty of other wildlife in the area, including three species of monkeys.