The Hassan II Mosque in Casablanca is not only an architectural marvel outside but also a stunning masterpiece inside. The mosque blends traditional Moroccan craftsmanship with innovative design, accommodating 25,000 worshippers inside and 80,000 in its courtyard. A standout feature is the retractable roof, which opens to the sky in minutes, allowing worshippers to pray under open air. When closed, the ceiling showcases intricate wooden carvings, hand-painted with vibrant colors and gilded details.