The Manoir de Kervegat is a 5 minute drive from the big sandy bay at Plestin Les Greves. Alternatively you can walk to the sea through the forest along charming lanes, past chateaux and villages. It is a long walk but when you arrive there are bars and restaurants to refresh yourselves.
The pretty harbour of Locquirec is about a 15 minute drive. The historic town of Morlaix is also very worth a visit, with a famous Saturday market.