Step inside the only fortified city north of Mexico. This complete guide to walking Old Quebec City takes you through 400 years of history — from the iconic Château Frontenac and the Plains of Abraham to the hidden ruins beneath Dufferin Terrace. Whether you're planning your first visit or want to go deeper than the highlights, discover Upper Town, Lower Town, and the stories most visitors never hear. Written by Jean-Simon, local guide and founder of Urban Horizons Tours.