The landscape is just stunning and I was surprised to learn that the lagoon is actually a former slate quarry. It was formed when the channel connecting the quarry to the sea was blasted, allowing the sea to flood in, creating its distinctive contrast of colours.
Today, the lagoon is better known for its adventure sports like coasteering and kayaking – and has even hosted the Red Bull Cliff Diving World Series twice.
But if you don’t fancy jumping in (apparently it’s freezing!) you can enjoy it from the Wales Coast Path.
Check out the National Trust website to plan a trip.