Blue Grotto
Sea cave in Italy
>
&tbnh=84&tbnw=150&usg=AI4_-kTFnOY2061UhQ62mnVM7OcSN1ywuw&vet=1&docid=1BLhVnJnIz5lHM&sa=X&ved=2ahUKEwjUjcvpit-FAxXdv4kEHcjTBQcQ9QF6BAgAEAQ)
&tbnh=84&tbnw=150&usg=AI4_-kTvtYhIEa45cgKNIfrcu2uhyCAU_A&vet=1&docid=ZlDOAT8RvDsqeM&sa=X&ved=2ahUKEwjUjcvpit-FAxXdv4kEHcjTBQcQ9QF6BAgAEAY)
&tbnh=89&tbnw=135&usg=AI4_-kQZnWhZAb0vxL-Sy56pPSnG80Gryg&vet=1&docid=EGxq-Tww6OSvQM&sa=X&ved=2ahUKEwjUjcvpit-FAxXdv4kEHcjTBQcQ9QF6BAgAEAg)
&tbnh=84&tbnw=150&usg=AI4_-kRmSRGSJAIXETxMAEuxF63m3PL2WQ&vet=1&docid=TAr1isVmOIVFYM&sa=X&ved=2ahUKEwjUjcvpit-FAxXdv4kEHcjTBQcQ9QF6BAgAEAo)
The Blue Grotto is a sea cave on the coast of the island of Capri, southern Italy. Sunlight shining through an underwater cavity is reflected back upward through the seawater below the cavern, giving the water a blue glow that illuminates the... Wikipedia