Explore Montreal from top to bottom—literally. This unique excursion takes you on an all-encompassing journey through this stunning Canadian city, from the bustling streets and plazas on the surface, to the vast network of luxury shops, businesses, and tunnels that fill downtown’s underground.

Start your day with a stroll down Saint Catherine Street and feel the city’s economic pulse as you gaze up at the grand façades and gleaming skyscrapers that loom overhead. Step off the sidewalk and onto the paths of Dorchester Square, where the dramatic figures of the Boer War Memorial stand watch over quiet park benches and neat flower beds.

After a walk down Peel Street, head underground and check out the other half of Montreal. As the largest underground complex in the world, the subterranean creation—known to locals as the RÉSO—is home to shops, restaurants, residences, hotels, banks, museums, and even an arena.

Let your experienced guide lead you through this incredible maze of businesses to reach the luxury boutiques of Les Cours Mont-Royal and Eaton’s Center. When you’re ready for some fresh air, pop back up in front of the ornate façade of the Christ Church Cathedral. Built in 1814, this glorious edifice is an official National Historic Site of Canada and the perfect place to wrap up your fascinating tour.