AquaFonte lists 2 verified thermal springs in Azerbaijan, each with its own page: temperature, minerals, treatments, and directions.
Water types found
Petroleum BathBalneologyHistoricalMud VolcanoGeothermalNaturalUNESCO
Springs
Gobustan Mud Volcanoes
Gobustan, Absheron Peninsula · 20°C
Azerbaijan hosts more mud volcanoes than any other country on Earth — over 400 — concentrated on the Gobustan plateau near Baku, alongside a UNESCO World Heritage rock art site spanning 40,000 years of human history.
Naftalan Petroleum Spa
Goranboy District · 37°C
The only spa in the world where patients bathe in naturally occurring crude oil — a naphthenic petroleum unique to this Azerbaijani city, used for centuries and developed into a major Soviet medical resort.