Ancient Kano City Walls - Credit: Wikimedia Commons
The Ancient Kano City Walls (Hausa: Kofar Na'isa) were ancient defensive walls built to protect the inhabitants of the ancient city of Kano. The wall was initially built from 1095 through 1134 and completed in the middle of the 14th century. The Ancient Kano City Walls were described as "the most impressive monument in West Africa". Read more on Wikipedia
Source: en.wikipedia.org