For nearly 400 years, Robben Island in Table Bay was a brutal prison where Nelson Mandela spent 18 years in a tiny cell during the apartheid era. Today, the island is a UNESCO World Heritage Site and a must-see attraction for anyone interested in South African history. The boat trip takes about 30 minutes to an hour depending on weather conditions and can be rough during big swells. While on the island, visitors tour the maximum-security prison, Mandela's former cell, and the lime quarry where prisoners were forced to endure back-breaking labor. The Cape Town Townships Tour including Robben Island gives visitors an overview of South Africa's past and present. The full-day small-group guided tour includes a round-trip ferry ride to Robben Island, a visit to Cape Town's District Six Museum, and the communities of nearby townships of Langa and Gugulethu.