The Taghaza salt mines were one of the most creative thinkers when it came to mining salt. The miners would pour salt into a hole that was drilled into the ground which resulted in salt water seeping out. later the water would evaporate and leave behind the salt.
The camels impacted the trans-saharan trade route massively, they can drink up to 25 gals. of water at a time, they could store the water for several days!
The Wangari gold miners had a secret spot where there were abundances of gold, and occasionally some would get captured and forced to tell the secret on where the spot was. Some say that they would rather give up their life than the location of the mine.
The tax system paid for armies to help protect Ghana.
The government of Ghana was controlled by the King.
In the Capital city of Kumbi, all of the tribes of Ghana would leave goods here for other tribes and hit a drum signaling that there was trading. If one of the tribes did not like what the others had to offer, then they would keep the items there until they got a good trade.