The Great Mosque of Djenné, a UNESCO World Heritage site and the largest mud-brick building in the world, is an iconic symbol of Sahelian architecture. Situated in the city of Djenné in Mali, it is best accessed via Mopti, which has better transport links, although the journey can be arduous due to underdeveloped infrastructure. Visiting the mosque independently can be challenging due to language barriers and navigation difficulties, so booking a guided tour is recommended for an informative experience. The best time to visit is during the dry season, from November to February, as roads can be impassable during the rainy season. The mosque itself is closed to non-Muslims for excursions inside, but the exterior and surrounding area can be explored, providing insight into its awe-inspiring structure and techniques. Visitors should prepare to spend a few hours exploring both the mosque and the vibrant weekly market held in the vicinity. Budget around $10-$20 for local guides and entrance fees, and factor in transportation costs from Mopti, which can vary.