There are multiple natural hot springs located around the country which are safe enough to bath in. Here is a list of Culture Trip favourites, some located at luxury resorts and others that are a bit off the beaten path.
Tabacon Grand Spa Thermal Resort: is home to one of the only completely natural hot springs that is present within a resort in the Arenal/La Fortuna area. The hot springs of Tabacon do not use any pumps or re-heating systems. The springs range in temperature from 25-50 Celcius/77-122 Fahrenheit.
The Springs Resort and Spa: is one of the top luxury resorts in La Fortuna, with quite a few natural hot springs for guests to enjoy. The resort is split up into two sections, La Lagunas and Perdido Springs. La Lagunas has eight hot spring pools that have varying temperatures between 28.3-40 Celcius/83-104 Fahrenheit. Perdido Springs is a beautiful maze of garden trails and hot spring pools.
Baldi Hot Springs: offers non-hotel guests reasonably priced day passes to its more than 25 natural spring-fed pools that vary in temperature, size and shape. Thus guests have a lot of choice when it comes to picking that perfect hot spring spot for a quick dip in nature.
EcoTermales hot springs: is located on a privately owned and family operated property; it is one of the few in the La Fortuna area that is not part of a large resort. A limited number of guests are admitted to the springs at any given time, so those who visit here can expect a more peaceful and even romantic atmosphere.
Titoku hot springs: is one of the smaller locations in the Arenal area, thus making it an ideal option for those looking to get away from the crowd and unwind in a more serene setting. Non-hotel guests can purchase a day pass at Arenal Kioro to the eight pools which vary in size and temperature.
Rio Agua Caliente: is located near the Arenal Observatory Lodge and is free to those who want to take a warm soak. There is an area a bit upstream from the bridge, before the lodge that is ideal for bathing in the mineral-rich thermal waters. This hot spring has a more local and natural feel to it due to its open access, as its not part of any hotel or resort and is completely free to enjoy.
Vandara hot springs, also called Tizate hot springs: are part of the Rincon de la Vieja National Park and fed from the thermal energy of the active volcano. The actual pool that the thermal spring bubbles into is man-made, but visitors can also take part in mud baths, mineral treatments, and even several different tours as part of this all-day adventure.
There is a variety of hot springs for all tastes and of the aforementioned there are more. You can do the tour in any of them or others and enjoy our beautiful country.