What Are the Must-See Things to Do On Oahu?

15 Iolani Palace

You won't regret visiting one of Honolulu's most underrated sightseeing spots. Iolani is the only royal palace in the United States. During a 90-minute self-guided or docent-led tour, you'll begin to learn the regal history of the region, including how Queen Liliuokalani was imprisoned upstairs after she was overthrown. The museum is currently reacquiring some of the furnishings that left the palace after the late 19th-century takeover.