This stately Greek Revival mansion has been at the centre of Hawaiian political life since 1846, when it was built by an American sea captain and named after George Washington. It became the home of Queen Liliuokalani, Hawaii's last reigning monarch, and later served as the official governor's residence for over a century until a new governor's mansion was built next door in 2008. The restored interior preserves both its colonial architecture and its Hawaiian royal heritage, with personal effects of the queen on display. Free guided tours are available by reservation and offer a poignant window into Hawaii's complex history of monarchy, annexation, and statehood.