This castle is sitauted in Rocquaine Bay itself. From the picture it is difficult to see, but there is a short pier leading from the shore to the fort itself, allowing people to visit the maritime museum which is the modern day purpose of the fort.
The fort is known as the 'Cup and Saucer' by locals due to it's distinctive white column sticking out of the dark rock. The Fort was once part of the island defences, especially in Nepoleonic times, and it was also used as a fortress by the Germans during the Second World War.
The Fort can be seen from anywhere in the bay, as long as it isn't foggy or misty, and is lit up at night. In the photo, behind the fort, you can see the southern side of the bay called Pleinmont. Walks through this area are beautiful as you get a good view of the bay and Lithou Island which is at the other end of the bay.
The bay is also home to the Hanois Lighthouse which is just off the Pleinmont point. This was built many years ago because of the amount of ships that were being wrecked off the South-West Guernsey coast. More recently, the lighthouse was also one of, if not the, last lighthouses in the UK to be manned; all lighthouses are now automatic.
Please click on either of the photos for a closer look.