In Turkey, Pamukkale is considered the eighth wonder of the world (another one!). So it is a wonder that the government has botched up this amazing tourist destination. Access is much more limited than it was before it became a World Heritage Site, but at least it has been preserved. I would still make the effort to get there.
Deriving from springs in a cliff almost 200 m high overlooking the plain, calcite-laden waters have created at Pamukkale (Cotton Palace) an unreal landscape, made up of mineral forests, petrified waterfalls and a series of terraced basins. At the end of the 2nd century B.C. the dynasty of the Attalids, the kings of Pergamon, established the thermal spa of Hierapolis. The ruins of the baths, temples and other Greek monuments can be seen at the site.
TURKEY The hot springs at Pamukkale, meaning "cotton castle" in Turkish, are in south-western Turkey. It is some 2,700 meters long and 160 meters high and can be seen from a great distance. Every second, 250 liters of hot water rises from the spring. The water contains large amounts of hydrogen carbonate and calcium, which merge to form calcium bi-carbonate. This natural phenomenon leaves thick white layers of limestone and travertine cascading down the mountain slope, which resemble a frozen waterfall.
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For a 6 minute video of the area and more photos check out kusadasi.biz/pamukkale. For a slideshow of photos see this link below