Below Cap Diamant, the cliff where Old Québec is located, is Lower Town (Basse-Ville in French). A must-see highlight is Quartier du Petit Champlain. This early 17th century neighborhood is considered to be the oldest commercial zone in North America. Since 1635, the primary access has been via Breakneck Stairs. As the name implies, Escalier casse-cou is very steep. Navigating your way along 59 steps is compounded by throngs of tourists.