This a picture of the spirit attenuation well used by the slave masters during the slave trade in Africa. this is found along the slave route to there unknown destination in badagry.
<a href="//commons.wikimedia.org/wiki/User:Yemi_festus" title="User:Yemi festus">Yemi festus</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>