Astem Cave is a distinctive and unique natural wonder, located in the city of Mersin, attracting attention with its unique beauty and visited by many tourists today. It is believed that Asteem Cave, or as it is called Asthma Cave, is useful for asthmatic patients and has positive improvements, and this cave helps open the breath of those who visit it because of its air, which was the subject of even legends, as it dates back to the third geological era. The galleries in Astem Cave, which are 200 meters long, are connected to each other and consist of giant stalactites and stalagmites, each consisting of an accumulation of minerals called silica, while the humidity in this cave is about 85 percent in summer, it reaches about 95 percent in In winter, in addition, the cave's interior lighting provides great views for taking pictures.