The attempt of the thermal spring water to transform into normal conditions causes precipitation and travertine formation. The excess amount of calcium bicarbonate in the thermal water and the discharge of water to the surface emits carbon dioxide and calcium carbonate precipitates. Precipitation of carbon dioxide in the thermal water continues until the carbon dioxide in the air reaches equilibrium. In the formation of whiteness, weather conditions, heat loss, flow propagation and duration are effective. In the analyzes performed on site, the average amount of carbon dioxide in the source water is 725 mg / l, while when the water leaves the travertine, this amount drops to 145 mg / 1. Likewise, the calcium bicarbonate likewise falls from 1200 mg / l to 400 mg / l. Ca 576 / 8mg / 1. According to the result of this analysis, 1lt. 499.9mg on travertine from water. CaCO 3 precipitates. This amount is 1 1 / sec. 43191g per day for water. deposition. The average density is 1.48g / cm 3. The average flow rate of the water is 466.21 / sec. Since it is 13584m 2 area can be whitened. In practice, it is difficult to fulfill these requirements. However, according to this theoretical approach 1mm per year. thickness of 4.9km 2 area can be whitened.

Hierapolis Archeology Museum, which was built during the Roman period and preserved as a Roman Bath until 1984, has many historical monuments that have survived centuries ago. The artifacts uncovered from some settlements in Caria, Psidia and Lydia Regions are collected and exhibited in the Hierapolis Museum. The museum is divided into 3 sections according to the structure of the works and the regions where they are extracted.