Saint Martin (Jersey)
Saint Martin is in Jersey.
The coastline. Easiest if you walk: it's 400 yards from St Catherine's Breakwater to Fliquet on foot and about three miles if you drive. The section from St Catherine to Rozel is one of the least spoilt parts of Jersey.
The Royal Inn, next to St Martin's Church (bus 3, 3A) does very respectable pub grub at a reasonable price.
The Hungry Man at Rozel (technically just over the border in Trinity) is a Jersey institution - it's a gaudily-painted shack on the pier, serving burgers and bacon sandwiches. There are benches on the pier. Reputedly the cheapest mug of tea on the island (50p)!