In the underwater jungle

There are sometimes days when familiar surroundings feel like uncharted territory. It was hot and still, and the sea around Burgh Island was smooth and benign. The water was calm and clear; we could see every frond of seaweed as we swam over rocky mountains and chasms below. It was so still that we were able to go in and around the rock formations that surround the island, venturing through channels and into coves and caves. At one point we came up against a vast, chunky, almost geometrically carved cliff face that looked, as my friend Anna said, like something out of Lord of the Rings. We were truly in another magical and mystical world.