With Volcan Arenal nearby La Fortuna has several hot springs perfect for relaxing those tired muscles of yours after a day of hiking. There are a handful of options including ritzy all inclusive spa resorts but when my friend and I were traveling through the area we opted for the low key Eco Termales, pictured above.
Eco Termales has a limited entry policy so make reservations if possible. I loved this spot because of it's minimalist elegance. Even the entry from the main road is obscured as opposed to the flashy facade of another hot springs across the street. The naturally-fed pools are nestled within the woods and it gives you the feeling of bathing in a secret spot in the woods. Temperatures differ from each pool and there are unexpected nooks and seats where you can just sit, relax, and stay for hours.