One of the most popular spas is in Sandanski. The town is situated in the south-west part of Bulgaria at the foot of Pirin Mountain, 120 km southwest from Sofia. Its mild Mediterranean climate makes it an international health resort. The air contains no allergenic aerosols, there are no fogs, and the relative air humidity is very low. This Bulgarian town, at an altitude of 224 m above sea level, has an average annual temperature of about 14°C, with the highest sunshine duration of 2 436 hours a year. 

     Spa hotels in Sandanski are: Interhotel Sandanski, Medite, Park Hotel Pirin, Sveti Nikola, Panorama, St. Vrach Hotel, etc