Just outside the town of Boulogne-sur-Mer, the Colonne de la Grande Armee marks the site of the Boulogne Camp where Napoleon kept his troops from 1803 to 1805 in preparation for an invasion of England. Made from local Marquise marble, the 54-meter-high column is topped with a statue of Napoleon. A spectacular view over the Boulonnais region and across the Channel can be enjoyed from the top of the 263 steps that lead to the monument.