The Blue Grotto, Capri Italy. The sunlight shines in a cave with a small opening, reflects off the white sand then up through the water.
Villa di Agrippa Postumus near Sorrento
Lovely Bagnone in Tuscany, Italy. …
A side pool
"Grutas de Tolantongo" Hidalgo estate in Mexico
Zakynthos island, Greece. - Selected by www.oiamansion.com in Santorini