Mosque of Djenne is built entirely of clay, topped by the tower-like dome, it rises above the surrounding desert, like on "Sand Castles" on the shores of a fantastic Yellow River. It is the world's largest structure made of clay, built in 1905 on the foundations of the mosque XI c., It is 100 meters high and 40 meters wide, and one of the finest examples of Sudanese architecture. The only drawback of the mosque is that it tends to "melt" in the rainy season. Jenna is located in the Niger River delta and is particularly picturesque in the rainy season, when the whole area is transformed into an island surrounded by the waters of the great river.   I can complement the description