Affectionately dubbed "Canada's Front Door," Pier 21 served as the entry point for nearly a million immigrants between 1928 and 1971. It's now a national museum where the immigrant experience is re-created. Several innovative exhibits make this well worth a stop, among them the holographic multimedia presentation, shown inside a faux ship, detailing the arrival of immigrants. Beside the ship sits a Canadian National train car in whose compartments you can hear different first-person accounts of immigrants who continued westward from Halifax. (The train itself is stationary, but these oral histories are definitely moving.) The museum's many hands-on displays have built-in kid appeal, and special activities, like having "passports" stamped at various stations, are designed to engage young visitors. A research center, a gallery, a café, and a gift shop are on-site as well.