The Spa is located in Las Caldas de Besaya, which belongs to Los Corrales de Buelna, and this name is due to the hot spring that flows nearby, already known since Roman times (warm waters).
On November 15, 1753, the old "Camino de las lanas" or "Camino de las harinas" that ran through this point and along the Besaya, reached the rank of "Camino Real" significantly improving the transport conditions of Castilian products. that were heading to our coastal ports, for export abroad. The building is next to the railway stop across the old donkey back bridge. Years later, the main road would pass through and all of this contributed to facilitating the communications of the Spa, although at the moment they are all in disuse but the number of travelers has not decreased for this reason and they are still very crowded.
The spa was built in the mid-19th century together with the hotel, guest house and casino, which was formerly an annex building. Today it is restored, being considered the oldest in the region and continues to receive those who want to benefit from its mineral-medicinal waters.