In Chapter 4, where did the narrator and Lamin go and what did they do there?

The narrator and Lamin went to Kunta Kinteh Island. Lamin arranged the transportation with his friend Lolu, a cab driver. They visited the sites on the island. There was a concrete statue of a stick man whose head was the Earth. He was yanking his arms from the chains of slavery. There was a small slavery museum and cafe, where they ate.