Located at the northern end of Oléron island, the Chassiron lighthouse allowed seamen to enter the waters of Antioch narrows, area reputed for its numerous shipwrecks. Completed in 1836, Chassiron tower was visible 7 leagues (39 km) away. Nowadays, thanks to its lantern situated 43m above sea level when the skies are clear, its eight beams of light are visible from 33 miles (52 km) away. After having climbed the 224 steps, from "world's edge" you will admire the view of La Rochelle, the isles of Ré and Aix, Oléron lengthwise and, of course, Fort Boyard. The lighthouse's foundations are 18 meters in diameter and 3 meters deep. Renowned for having been used when Cologne cathedral and the socle of the Statue of Liberty were under construction, the stones originate in the quarry named Crazannes (Charente Maritime).