Istisu Thermal Spring is a renowned natural hot spring located near Lankaran, a city in the southeastern region of Azerbaijan known for its luscious subtropical climate. Lankaran is situated on the coast of the Caspian Sea, and the area boasts an abundance of natural attractions, including the Talysh Mountains and Hirkan National Park. Istisu, which means 'hot water' in Azeri, lives up to its name with its thermal mineral waters that emerge from the earth at high temperatures. These waters are rich in minerals and are believed to have healing properties, attracting visitors who seek therapeutic and recreational experiences. The thermal spring is set in a scenic environment, surrounded by a diverse landscape that includes dense forests, mountainous terrain, and vibrant wildlife. Tourists can immeraze themselves in the traditional baths and benefit from the hydrothermal therapies offered in the local bathhouses or sanatoriums. The cultural importance and health benefits associated with the hot springs have made Istisu a destination for wellness tourism in Azerbaijan.