Les Eclaireurs Lighthouse, Maritime lighthouse in Beagle Channel, Argentina.

Les Eclaireurs is a red and white striped brick tower standing on the northeasternmost island of the small Les Eclaireurs island group in the Beagle Channel, roughly 9 kilometers from Ushuaia. The cylindrical structure rises 11 meters (36 feet) above a masonry base, with a single door facing west and no windows in its walls.

The Argentine Navy began building the tower in December 1918 and finished in January 1919, but operations were delayed until December 1920 due to material shortages. Since then, the structure has guided ships through the dangerous waters near the southernmost city in the world.

Argentines call it the Lighthouse at the End of the World, a name that actually belongs to the San Juan de Salvamento lighthouse on Isla de los Estados, which Jules Verne made famous in his novel. Boat tours from Ushuaia still sell the trip under that label, so the misnomer has become part of the visit itself.

The tower can only be seen from the water, so boats from Ushuaia approach for photographs without landing. On calm days, visitors get close views of the brickwork and circling seabirds, while rougher conditions shift focus to the wider channel landscape.

The light stands 22.5 metres above sea level and is powered by solar panels. The two sources give different flash intervals and ranges: the Spanish article states white and red light every 5 seconds with a 7.2-nautical-mile range, while the English article states white flashes every ten seconds with a 7.5-nautical-mile range. The tower has no windows, and only a door facing west gives access.