Trégon

Saint-Jacut-de-la-Mer (French pronunciation: [sɛ̃ ʒaky də la mɛʁ], literally Saint-Jacut of the Sea; Breton: Sant-Yagu-an-Enez) is a commune in the Côtes-d'Armor département of Brittany in northwestern France.

The Singing Stones of Brittany (or Pierres sonnantes du Guildo) are a number of rocks located on the left bank of the river Arguenon opposite the ruined castle of Gilles de Bretagne at Notre-Dame-le-Guildo, near Dinard in the Côtes-d'Armor, France. The stones are round and smooth, shiny black and extremely large, weighing in excess of ten tonnes each and are made of a heavy metallic stone that rings like a bell if struck by another smaller piece of the same stone. There are hundreds of tonnes of them and there is no indication of where they came from or how they got there. They are basalt, but this type of rock is usually associated with volcanic eruptions and there is no evidence or history of volcanic activity there. The stones are unlike any of the surrounding stones either on the ground or on the cliff face overlooking them; legend has it that these stones were spewed up by the giant Gargantua.

Saint-Jacut Abbey (French: Abbaye de Saint-Jacut) is located in the east of the Côtes-d'Armor department in Brittany, at the end of the peninsula of Saint-Jacut-de-la-Mer. It is named after the 5th-century Saint Jacut. It is now a retreat and holiday centre run by a community of the Sisters of the Immaculate of Saint-Méen-le-Grand.

The Arguenon (French pronunciation: [aʁɡənɔ̃]; Breton: Argenon) is a French coastal river in the Côtes-d'Armor department of the Brittany region. It flows into the English Channel.

Créhen (French pronunciation: [kʁeɛ̃]; Breton: Krehen; Gallo: Qerhen) is a commune in the Côtes-d'Armor department of Brittany in northwestern France. The Arguenon river flows through the commune.

Beaussais-sur-Mer (French pronunciation: [bosɛ syʁ mɛʁ]; Breton: Bosez-Poudour) is a commune in the department of Côtes-d'Armor, western France. The municipality was established on 1 January 2017 by merger of the former communes of Ploubalay (the seat), Plessix-Balisson and Trégon.

Ploubalay (French pronunciation: [plubalɛ]; Breton: Plouvalae) is a small town and former commune in the Côtes-d'Armor department of Brittany in northwestern France. On 1 January 2017, it was merged into the new commune Beaussais-sur-Mer.

Lancieux (French pronunciation: [lɑ̃sjø] ; Breton: Lanseeg; Gallo: Lansioec) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Saint-Lormel (French pronunciation: [sɛ̃ lɔʁmɛl]; Breton: Sant-Loheñvel) is a commune in the Côtes-d'Armor department of Brittany in northwestern France. The Arguenon river flows through the commune.

Plessix-Balisson (French pronunciation: [plɛsi balisɔ̃]; Breton: Ar Genkiz-Yuzhael) is a former commune in the Côtes-d'Armor department of Brittany in northwestern France. On 1 January 2017, it was merged into the new commune Beaussais-sur-Mer. With an area of only eight hectares, Plessix-Balisson was the smallest commune of the region and the second smallest in France, after Castelmoron-d'Albret.

The canton of Plancoët is an administrative division of the Côtes-d'Armor department, northwestern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Plancoët. It consists of the following communes: