This photo taken on May 8, 2026 shows a section of the Robben Island prison on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

Tourists take photos on Robben Island in Cape Town, South Africa, on May 8, 2026. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a lighthouse on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a view of a prison cell where Nelson Mandela was imprisoned on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a communal cell inside the Robben Island prison on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows the entrance to the Robben Island prison on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a communal cell inside the Robben Island prison on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a section of the Robben Island prison on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows a view of a prison cell where Nelson Mandela was imprisoned on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)

This photo taken on May 8, 2026 shows the Limestone Quarry where prisoners including Nelson Mandela worked on Robben Island in Cape Town, South Africa. Robben Island is known as the site where Nelson Mandela was imprisoned for 18 years, the majority of his 27 years in prison. Declared a UNESCO World Heritage site in 1999, it now serves as a museum and a top tourist attraction in South Africa. (Xinhua/Wang Lei)