
Why are people willing to enter this narrow crevice, even at the risk of their lives? This is the Grotta Azzurra, or Blue Grotto, in Italy. It is a narrow sea cave that can only be entered when the tide is calm. Inside, sunlight reflecting off the seabed makes the water appear bright blue. While it looks beautiful, the way out is much more challenging.
#natural #nature #sea #narrows #beautiful #facts #edit