Catarata Manantial de Agua Viva
This is Costa Rica's tallest waterfall, cascading 600 feet into freshwater pools where you can cool off after a strenuous 3-km (2-mile) hike to the river basin. You're not likely to see other tourists here—it's not one of the more well-known waterfalls. This steep trek is not suitable for children, the elderly, or those with health conditions. Bring drinking water and wear proper shoes as rocks can be sharp and slippery.