This lavish Monaco-Ville palace is home to the prince, of course (it’s in the name after all). The royal residence has sheltered the Grimaldi family (of the 13th century) and Prince Rainier III and his lovely wife, Princess Grace (of the 20th century). Today, Rainier’s son and heir, Prince Albert II, calls the Palais du Prince home. The palace also features a changing of the guard daily at 11:55 a.m. Many recommend at least stopping by to see the exterior of the palace on your Monaco vacation, even if you're not up for a tour of the state rooms. Travelers also say the views from the nearby terraces are impressive. Some said the changing of the guard is nothing special.

The state apartments are typically open from March through October; you can tour the rooms for 8 euros (about $9) for adults and 4 euros (around $5) for children.