Towering above Oued Bou Regreg, and surrounded by well-tended gardens, is Rabat’s most famous landmark. The Almohads’ most ambitious project would have been the second-largest mosque of its time, after Samarra in Iraq, but Sultan Yacoub al-Mansour died before it was finished. He intended a 60m-tall minaret, but the tower was abandoned at 44m. The mosque was destroyed by an earthquake in 1755, and today only a forest of shattered pillars testifies to the grandiosity of Al-Mansour’s plans. The tower is built to the same design as the Giralda in Seville, and the Koutoubia in Marrakesh.