Oahu is an island located in the Hawaiian archipelago. It is the third largest of the Hawaiian Islands and is home to the famous Diamond Head, a volcanic tuff cone that is a popular tourist destination. Oahu is also known as 'The Gathering Place' due to its central location in the Hawaiian Islands. The island is home to the state capital of Honolulu and is the most populous island in the state. Oahu is a popular destination for tourists and is known for its beautiful beaches, lush rainforests, and vibrant culture.