The Western Cape is a South African province with coasts bordering the Indian and Atlantic oceans. It's known for the port city of Cape Town, set beneath Table Mountain, part of a national park of the same name. In Table Bay, Robben Island is the notorious prison that once held Nelson Mandela, and is now a living museum. Farther afield, winelands surround historical towns like Stellenbosch, Franschhoek and Paarl. It is the fourth largest of the nine provinces with an area of 129,449 square kilometres (49,981 sq mi), and the third most populated, with an estimated 6.6 million inhabitants in 2018.