Downtown Honolulu
The only royal palace in the United States — former residence of the last Hawaiian monarchs, Kings Kalakaua and Queen Liliuokalani. The self-guided audio tour recounts the illegal overthrow of the Hawaiian kingdom in 1893 with striking historical candor. The palace was restored to its 1882 state; the throne room and blue room are extraordinary. An essential 60 minutes for anyone wanting to understand Hawaii's complicated history.
Advance reservation required at iolanipalace.org — no tickets sold on-site. Audio guides available in French, Japanese, and other languages on Tuesdays, Fridays, and Saturdays (9am–3:45pm). From $25 adults / $15 children.
Indoor air-conditioned — excellent rainy day option. Book ahead; weekend slots fill quickly.