Tevennec lighthouse

Tevennec lighthouse is a stone tower rising 11 meters from a rocky outcrop in the waters between mainland France and Île-de-Sein. It marks the Raz de Sein passage, one of the most challenging maritime routes in the region.

The lighthouse began operating in 1875 to guide vessels through the treacherous Chaussée de Sein coral reefs that had claimed many ships. It was designed by architect Léonce Reynaud and served as a vital aid to navigation in these dangerous waters.

Local fishermen documented numerous accounts of strange sounds from the cave beneath the lighthouse, which echo through the structure during storms.

The lighthouse operates automatically and sends out white light signals visible from far away to guide ships safely through the passage. Visitors can view the structure from the water or take photographs from nearby Île-de-Sein, which sits close enough to get a good look.

The first lighthouse keeper reported hearing unexplained voices echoing through the structure during storms, sounds said to come from caves beneath the tower. This led authorities to change the station from single to double-keeper operation so no one had to endure the isolation alone.

Location: Île-de-Sein

Inception: 1875

Architects: Leonce Reynaud

Elevation above the sea: 295 m

Height: 11 m

Made from material: stone

GPS coordinates: 48.07136,-4.79539

Latest update: December 7, 2025 19:24