Chateau de la Roche-Jagu is a castle located in the town of Ploëzal in Brittany, France. It is perched on a rocky hilltop overlooking the Trieux estuary and was built in the 15th century by the wealthy Jagu family.

The castle has undergone extensive restoration work in recent years and is now open to the public. Visitors can explore the castle's interior, which features exhibitions on the history of the castle and the surrounding region, as well as a collection of artworks.

In addition to the castle itself, the Chateau de la Roche-Jagu also boasts beautiful gardens, which cover an area of over 100 hectares. The gardens feature a range of different landscapes, including formal French gardens, English-style gardens, and a natural woodland area.

One of the highlights of the gardens is the rose garden, which features over 200 varieties of roses. There is also a vegetable garden, an orchard, and a collection of exotic plants from around the world.