Canton of Guichen

Guichen (French pronunciation: [ɡiʃɛ̃]; Breton: Gwizien; Gallo: Gischen) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Lassy (French pronunciation: [lasi] ; Breton: Lazig; Gallo: Laczic) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.

Goven (French pronunciation: [ɡɔvɛ̃]; Breton: Goven; Gallo: Govaen) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Guignen (French pronunciation: [ɡiɲɛ̃]; Breton: Gwinien; Gallo: Ginyen) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Saint-Senoux (French pronunciation: [sɛ̃ sənu]; Breton: Sant-Senour; Gallo: Saent-Senór) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

The catastrophe du Boël (disaster of Boël) was a landslide that occurred on June 6, 1884, in a quarry at a place named Le Boël in Bruz, Ille-et-Vilaine, in the west of France. The landslide killed eight people including two children. Groundwater that weakened the cliff and damage caused by explosives used to remove red shale (found as a construction material in the local churches) from the quarry were the principal causes of the accident. The search to recover the bodies took five days. At the time, the event left its mark, probably because of the death of the children and because it impacted different social classes. Editors of several newspapers from Rennes collaborated and sold a magazine at 50 cents apiece to benefit the victims. Donation campaigns were also carried out by the local press.

The Seiche is a 97.3 km (60.5 mi) long river in western France located in the departments of Mayenne (Pays de la Loire) and Ille-et-Vilaine (Brittany). It is a left tributary of the river Vilaine. It flows into the Vilaine near Bruz, south of Rennes.

Bourg-des-Comptes (French pronunciation: [buʁ de kɔ̃t]; Breton: Gwikomm; Gallo: Bórg-Cons) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

The Meu (French pronunciation: ​[mø]) is an 84.1 km (52.3 mi) long river in the Côtes-d'Armor and Ille-et-Vilaine départements, north western France. Its source is at Saint-Vran, 2.4 km (1.5 mi) west of the village. It flows generally southeast. It is a right tributary of the Vilaine into which it flows at Goven, 5.7 km (3.5 mi) northeast of the village.

The Semnon (French pronunciation: [sɛmnɔ̃]; Breton: Sevnon) is a 73.3 km (45.5 mi) long river in the Mayenne, Maine-et-Loire, Ille-et-Vilaine and Loire-Atlantique départements, northwestern France. Its source is at Congrier. It flows generally west-northwest. It is a left tributary of the Vilaine into which it flows between Pléchâtel and Bourg-des-Comptes.

Saint-Malo-de-Phily (French pronunciation: [sɛ̃ malo də fili]; Breton: Sant-Maloù-Fili) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France. It is about 25 km south of Rennes.

Pléchâtel (French pronunciation: [pleʃatɛl]; Breton: Plegastell) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.