Overview
The first time you see the Blue Grotto, you won't believe it's real. In a little wooden boat, you're rowed through a small rocky entrance into a low cave. The stone above is dark while the water beneath is glowing a bright, iridescent and almost magical azure blue. This effect of ultra-bright blue water in the 60-metre-long cave is caused by the reflection of light from the world outside. The walls of the cave also bounce sound back and forth with pleasing, ethereal acoustics — you might want to give singing a try, or your skipper may oblige as a demonstration.
You can book a tour from Marina Grande. Aim for the sweet spot between 12–2pm, when the reflections are at their most captivating.
Images: Getty Images via Canva.