'Iolani Palace

This 10-room historic house and museum details the reigns of King Kalakaua and his sister Queen Liliuokalani, Hawaii's final monarchs. Recent travelers appreciated this unique glimpse into Hawaii's culture. And though visiting the 'Iolani Palace is pricey (as much as $20 for adults), it's your only chance to tour a royal residence on American soil.

The palace's powers-that-be have a number of semi-strict rules in place to preserve the home. You'll have to savor the memory of 'Iolani's royal china and glittering gems in your mind—picture-taking is forbidden. Kids under the age of five are delegated to the basement and not allowed on the first and second floors, so plan ahead if you're traveling with your young ones. Finally, you will have to wear cloth booties to keep from scuffing the fancy koa wood floors. Still, the palace is a treat for anyone interested in the history of the Hawaiian monarchy. Following the tour, be sure to swing by the gold-and-black statue of King Kamehameha that stands across the street.

You'll find the 'Iolani Palace in downtown Honolulu. Guided tours, which cost $20 per adult, take place every 15 minutes between 9 a.m. and 5 p.m. Monday through Saturday. You can also opt for a self-led or audio tour for $12. Both tours last about one hour. Visit the palace's website for more information on specific hours of operation and fees.