pamukkale turkey blue water white mineral terrace travertine pool turkish rock scenic landmark calcium thermal spring geology sink

water turkey travel landscape white blue mineral nature pool scenic terrace landmark rock travertine calcium beautiful natural geology thermal turkish famous mountain pamukkale carbonate tourism formation unesco heritage outdoor bath waterfall hierapolis balcony place destination basin reserve chalk attraction turquoise geological sightseeing limestone east denizli location ancient beauty summer flowing sink transparent cyan geologic bathe spring cloud salt stalactite terraced antique bathtub tourist vacation deposit cascade sky background crystalline lake hot view reflection healthy resort wonder spa bathing pamukale geyser