Zilum - Credit: Wikimedia Commons
Zilum is a settlement of the Gajiganna culture located in the Chad Basin of northeastern Nigeria, 72 km north of Maiduguri in Borno State and is dated to ca 600-400 BCE. The site itself is relatively flat, sits on a large sand ridge, and is bordered to the south by a clay depression. Zilum was discovered in 1997 by Peter Breunig and from 2000-2002, Carlos Magnavita began several test excavations at the site. Read more on Wikipedia
Source: en.wikipedia.org