Robben Island, located off the coast of Cape Town, is a UNESCO World Heritage Site renowned for its historical significance as a former prison that held prominent political prisoners, including Nelson Mandela. The island offers guided tours that provide insights into its turbulent past, showcasing the cell where Mandela was imprisoned and the remnants of the island's past as a leper colony. Visitors can enjoy breathtaking views of Table Mountain and the Cape Town skyline, making it a poignant yet beautiful destination.