The unfinished minaret of a 12th-century mosque that was never completed, standing alongside the mausoleum of Morocco's modern royal family. The site is open and free to visit, with the columns of the original mosque still standing in rows across the plaza.
It sits right on one of Rabat's main avenues, so it is an easy stop to combine with a drive through the city centre or a visit to the nearby Kasbah of the Udayas.
Photo: Timothy A. Gonsalves / Wikimedia Commons (CC BY-SA 4.0)