The dramatic mountain scenery and astonishing natural beauty of Costa Rica's Northern Plains boast endless opportunities for adventure. Its magnificent terrain of cascading waterfalls, raging rivers, sparkling lakes, thermal springs and exuberant forests ensure its eminence as a mecca for leisure, adventure and ecotourism. Visitors can view the vast array of wildlife at one of the many sanctuaries, such as the biodiverse Cano Negro Wildlife Refuge, hike through the trails at Arenal Volcano National Park, and sail across Arenal Lake, the largest lake in Costa Rica. Popular activities include kayaking, white water rafting, bird watching, horse riding, cycling, boat cruises, canopy tours and ziplining.