AquaFonte lists 9 verified thermal springs in Bulgaria, each with its own page: temperature, minerals, treatments, and directions.
Water types found
Springs
Aquae Calidae (Burgas Mineral Baths)
Burgas Province
A continuously used hot spring on the outskirts of Burgas, sacred to the Thracians, developed by Rome under Trajan, rebuilt by Suleiman the Magnificent, and now an archaeological museum park.
Central Mineral Beach, Velingrad
Pazardzhik Province
An open-air public mineral pool in the Lyudzhene district of Velingrad, the town known as the 'Spa Capital of the Balkans' for its 80-plus natural springs.
Dolna Banya Mineral Springs
Sofia Province
A weakly mineralized, alkaline hot spring town on the northern slopes of the Rila mountains, among the most powerful thermal sources in the Rilo-Rhodope region.
Mineralni Bani Thermal Springs
Haskovo Province · 48.5°C
A designated national balneological resort at the foot of the Eastern Rhodopes, drawing on 12 natural springs that emerge at 48.5°C.
Momina Banya, Hisarya
Plovdiv Province · 41°C
One of Hisarya's 22 mineral springs, prized for its radon content and site of Bulgaria's first scientific water analysis in 1882, in a Roman spa town visited by Emperor Septimius Severus.
Ognyanovo Mineral Springs
Blagoevgrad Province · 37.5°C
A weakly mineralized, strongly alkaline spring resort in the Rhodope foothills near Gotse Delchev, where springs of 35–41.5°C surface beside the Kanina River.
Rupite Thermal Springs
Blagoevgrad Province · 75°C
A geothermal field on the western bank of the Struma River, 11 kilometres from Petrich, where springs of 71–78°C rise beside the eroded remains of an extinct volcano.
Sandanski Mineral Springs
Blagoevgrad Province · 81°C
One of Bulgaria's hottest spa towns, drawing on more than 80 municipal springs reaching up to 81°C, credited with the country's lowest air allergen levels and used for respiratory rehabilitation.
Vazrazhdane Mineral Pools
Sofia City Province · 28°C
A municipal mineral-water pool complex in central Sofia, fed by the same underground basin of more than 40 natural springs that supplies the city's famous free public fountains.