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Weisse Travertin Kalksteinfelsen Formationen bekannt als die Baumwollburg, Pamukkale, Denizli, Anatolien, Tuerkei. White travertine limestone rock formations known as the cotton castle, Pamukkale, Denizli, Anatolia, Turkey, Asia Minor, Asia. (KEYSTONE/imageBROKER/Marco Simoni)