Close to the Caño Negro river and Lake Arenal, Rancho Margot is part off-the-grid eco lodge, part self-sufficient organic farm, part science laboratory. In 2004, Chilean-born Juan Sostheim bought 400 acres of a former cattle ranch and began to replenish the decimated land with endemic flora and fauna. Still a work in progress, they grow their own crops, produce their own electricity, build their furniture from reforested trees and make biodiesel using leftover cooking oil. Accommodation ranges from spacious bungalows to bunkhouses and horse riding, mountain biking, hiking, kayaking, waterfall rappelling and yoga are all on offer. Afterwards, you can ease your muscles in rock pools before a farm-to-table feast.