Thanks to the Arenal Volcano's geothermal activity, there is a number of natural hot springs throughout the area. Warm and soothing, these springs offer an ideal way to relax after a day spent exploring Arenal. Mineral-rich and naturally heated Hot Springs contain everything from simple calcium to lithium, and even radium. Soaking in the hot springs allows minerals to pass through your skin and be absorbed and utilized by body cells. This can fight the effects and symptoms of fatigue, insomnia, edema, poor micro-circulation and repressed immune system. it also helps to increase metabolism, accelerate healing, soothe muscles, improve blood circulation, and detoxify the body's lymphatic system.

Each hot spring facility is unique in its own right; some have both hot and cold pools, and others have waterslides or swim-up bars. Eco Termales Hot Springs: It is a sanctuary of pleasure, nature and beauty. It is the smallest of the Arenal hot springs and is geared toward privacy and relaxation; it does not accept more than 100 visitors at one time. Facilities also include spacious and elegant restrooms and changing rooms, lockers, and a towel rental service. Tabacon Hot Springs: It was the first Hot Springs resort open to the public in the Arenal Volcano Region and is still the top-rated, most acclaimed and publicized luxury Hot Springs and Spa resort in Costa Rica, There are five different springs, a swim-up bar and waterslide. It has a spa that offers a variety of treatments. The Titoku Hot Springs consist of 8 pools. These luxurious facilities are part of the Arenal Kioro Hotel and Resort but are located on a separate piece of property, thereby allowing non-guests to come and enjoy the pools. There is both indoor and outdoor seating as well as a full-service bar.