Hassan II Mosque

(Image source: travel.sina.com.cn)

The Hassan II Mosque or Grande Mosquée Hassan II is the largest mosque in Morocco and the 13th largest in the world. Its minaret is the world's tallest at 210 meters. Completed in 1993, it was designed by Michel Pinseau and built by Bouygues. The mosque stands on a promontory looking out to the Atlantic Ocean, worshipers can pray over the sea. The walls are of hand-crafted marble and the roof is retractable. A maximum of 105,000 worshipers can gather together for prayer: 25,000 inside the mosque hall and another 80,000 on the mosque's outside grounds.