Robben Island was named a World Heritage site in 1999.
Robben Island was the prison turned museum that was among South Africa's first World Heritage sites in 1999.
...the prison is on the island.
Robben Island
Kangaroo Island is not World Heritage listed.
Robben Island is South Africa's most secure prison.
If German in origin it means "island of the seals", as Robben is plural for seal..
Robben Island is Dutch for "Seal Island". Obviously you see seals there. In this case the Cape Fur seal.
Robben Island
in robben island
Robben Island is about 5 miles (8 km) offshore of Capetown, South Africa
because there are seals there