P stands for Pamukkale
The spring waters tumbling into the river below.
Pamukkale ( Cotton Castle) is an enchanting and remarkable sight in Turkey. It is set high upon a plateau almost 400 feet high, rising in a curtain of stalagmites and stepped shallow pools, merging one into another on hundreds of different levels. It's described as a fairyland of cotton white forms with pale blue water cascading gently down.