I saw several guides saying that Oahu Island is used to transfer to other islands, but in fact, Oahu has both beautiful natural scenery and a lot of cultural landscapes. There is also a large outdoor shopping mall that is definitely worth spending four or five days. it's here.
Oahu is the most densely populated island in the Hawaiian Islands and is also the seat of the capital of the state of Hawaii. Compared to other Hawaiian islands, Oahu is much more lively and prosperous in business, especially along Waikiki Beach, where life is the most colorful downtown. The ecology on the island is very good. There is a red-crowned bird, very beautiful, only found in Hawaii.
Oahu is a part of the Hawaiian Islands, with very beautiful beaches, it is the best choice for travel and vacation.