La Fortuna Waterfall is in central Costa Rica, in the Alajuela Province. In Spanish, it is known as Catarata Fortuna.
The waterfall drops about 70−75 meters and is at the base of the dormant Chato volcano, about 5.5 km outside of the town of La Fortuna, near the Arenal Volcano. It is fed by the Arenal River, which travels through the rain forest in the Arenal Mountain range until it plunges over the cliff, forming this waterfall.
The admission is US$18 for adults and $18 for children over 6. The hike down to the waterfall is short and arduous, along a staircase carved into the hillside. Guests are encouraged to swim in the stream and small rapids below the falls, and there's a lifeguard on duty.