The Blue Grotto, Capri Italy. One of the most amazing thing I've seen. The sunlight shines in a cave with a small opening, reflects off the white sand then up thru the water Explore the World with Travel Nerd Nici, one Country at a Time.
The inspiration for the Karka Queen's habitat in Southsun in Guild Wars Natural Rock Pools, Pamukkale Turkey. Pamukkale's terraces are made of travertine, a carbonate sedimentary rock deposited by water from the hot springs.