FILE PHOTO: A man looks out from a sea viewing commenorative building that is known locally as ‘The Tunnel’ that is sited near the ‘Point of No Return’ where slaves were shipped from the slave port at Badagry, Nigeria June 21, 2019. The 400-year anniversary of the first slave boat to arrive in America from Africa has caused a rush of interest in heritage tourism in West Africa, as descendants of slaves from America, the Caribbean and Europe visit ancient sites to delve into a dark and often hidden past. Picture taken June 21, 2019. REUTERS/Afolabi Sotunde/File Photo