Les Casquets, Rock formation near Alderney, Guernsey
Les Casquets is a group of rocky outcrops rising from a sandstone ridge in the English Channel, positioned about 8 miles (13 kilometers) northwest of Alderney. The jagged formations were shaped by millennia of erosion and create a striking sight against the surrounding seascape.
Three lighthouses were built on the rocks in 1724 to improve navigation through the English Channel. This construction marked the beginning of technological solutions for one of Europe's most hazardous sea passages.
The dangerous nature of Les Casquets inspired Victor Hugo's writings in 'The Laughing Man', where he detailed the different destructive effects of shipwrecks on these rocks.
The waters are characterized by strong tidal currents that make navigation difficult and require careful planning for any visit. A boat trip works best during calm weather and favorable tidal conditions.
The rocks serve as an important breeding ground for seabirds such as puffins and guillemots, which return each year during nesting season. This rich birdlife makes the site a hotspot for nature watchers.
Location: Alderney
GPS coordinates: 49.71778,-2.36861
Latest update: December 10, 2025 15:46
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