Arenal Volcano National Park draws on the imagination as you wander through each of its unique and bizarre landscapes. From the Heliconias trailhead, you ll walk into a hedge maze of tall grass– a similar species to sugar cane. The grass, known as brave cane, rises some twenty feet into the air on all sides of the trail, acting as the first of the pioneer plants that will lay the groundwork for the rainforest s regeneration.