The nonprofit university called EARTH (Escuela de Agricultura de la Región Tropical Húmeda, or Agricultural School of the Humid Tropical Region) researches the production of less pesticide–dependent bananas and other forms of sustainable tropical agriculture, as well as medicinal plants. The university graduates some 100 students from Latin America and Africa each year. EARTH's elegant stationery, calendars, and other paper products are made from banana stems, tobacco leaves, and coffee leaves and grounds, and are sold at the on-site Oropéndola store and in many tourist shops around the country. The property encompasses a banana plantation and a forest reserve with nature trails. Half-day tours are $20; full-day, $30; and lunch is $12 for day visitors. Though priority is given to researchers and conference groups, you're welcome to stay in the school's 50-person lodging facility, with private bathrooms, hot water, and ceiling fans, for $75 a night, which includes the use of a swimming pool and exercise equipment. The site is a bird-watchers' favorite; some 250 species have been spotted here. Advance reservations are required for tours or accommodation.