If hiking is your delight Arenal National Forest to observe flora and fauna. Our site has hiking and walking tours in Arenal, Costa Rica. Arenal is also ideal for Windsurfing on Lake Arenal.White Water Rafting as activitie near Arenal. See the Volcanoes near Arenal, Costa Rica. Birdwatching 400 species of birds. Visit active volcano, geotherman pools, Arenal Wildlife Refuge.