Hassan II Mosque

The third-largest mosque in the world, built on a platform over the Atlantic Ocean. King Hassan II commissioned it in 1980; 35,000 workers completed it in 1993. The minaret rises 210 meters — the tallest religious structure in the world, visible 30 kilometers out to sea. Non-Muslims can enter on guided tours, making this one of the few mosques in Morocco open to all. The interior is vast: room for 25,000 worshippers, a retractable roof, underfloor heating, titanium doors. The craftsmanship involved 10,000 artisans working for five years. The scale is intentional — a statement of modern Morocco's ambition and wealth. Critics note the cost (estimates exceed $500 million) in a country with significant poverty. But the building is undeniably impressive, and the tour is worth the trip to Casablanca. Best time: Morning tour (9 or 10am) Allow: 1.5 hours (tour only) Combine with: Casablanca's Art Deco downtown