There are lots of nice walking opportunities around the village, especially up into the coastal hills that overlook the sea, beaches and the village itself. There's a lighthouse somewhere, although we couldn't find it, but it was nice enough just to wander about aimlessly. The views were excellent, as you can see in the picture, which is only slightly spoiled by Ioan's gurning boat race in the middle of it.
...or you can sit grumpily on the coastal wall, on a scorching August afternoon, and pretend to read a French newspaper, as if the words meant anything to you, while getting very sunburnt, and kinda hungry because you had to throw away the burger you bought from the little take-away as you discovered the red stuff in the middle of the burger wasn't tomato sauce.
The village has a pretty little harbour, filled with small yachts and fishing boats bobbing up and down in the shallow water in front of the village's sea front. It makes a great place for a coffee on a sunny day.
Looking out towards Jersey and the Atlantic, Carteret has some wonder beaches to sunbathe on, or just to walk along. If you are coming to a seaside town like this, it would be surprising if the beach wasn't top of your list of places to visit!