EcoTermales Fortuna is one of the better-known hot springs options around La Fortuna, using the area's volcanic heat in a more contained and garden-like setting than the big resort complexes. Warm pools, tropical planting, and views toward the Arenal area make it an easy half-day recovery stop after hiking or waterfall visits.
This is still a paid spa-style attraction, so it will not suit travellers looking for wild springs or a rough local bath. Its appeal is comfort, scale, and convenience: a quieter soak, often with timed entry, close enough to La Fortuna to fit into a day without much planning.