This site is usually calm at depth or after a north-west wind has blown. Outer Castle is a really good dive site where you could see larger rays and gulley sharks. The reef life is quite colourful and abundant. There is also a really great swimthrough but you have to time it right because the surge can shoot you out there like a bullet.

Apparantly there is also an airfilled cave where divers can surface for a chat.

Average depth: 15m

Maximum depth: 22m