For much of the 20th century, robben island in south africa was most known as

A place for imprisonment.    

Explanation:

Robben Island was not a pleasure resort but served the purpose of imprisonment, isolation, and banishment for several centuries. In the 20th century, the island used as a prison for political prisoners of South Africa during the Apartheid government. One of the famous African person inmates held here was   Nelson Mandela, who became future South African President.      

unknown. best bet to watch it is at kissanime (a lot of popups and has ads and has potential to be a virus not recommended) or crunchyroll (recommended but has ads and has no popups). you will have to wait. i really want netflix to give the other seasons.