The narrow gap between the headlands where the sea pushes into and drains out of the lagoon is locally known as Pollurin. Stand on the south side at a turning tide and you can hear the water before you can see it move — a rush through the channel that you can comfortably step across at slack water and that would carry you away an hour later.
The footpath along the south shore of the lagoon brings you out at the outlet. From here you also get the cleanest view back up the valley toward the village, framed by hills on three sides. Avoid the temptation to wade or cross to the north beach — the floor drops off sharply at the outlet and the current at half tide is strong enough to be lethal.