A UNESCO World Heritage site, the Roman Theater of Orange is the most well-preserved ancient Roman theater in Europe, complete with a magnificent stage wall and an imposing 340-foot facade that Louis XIV once called “the finest wall in my kingdom.” With seating for up to 10,000, the theater continues to host shows to this day, including the Chorégies d’Orange opera festival every summer. Sure, you could skip the entry free and sneak a peek of the theater from the adjacent hill, but this testament to the glory of the Roman Empire really merits an in-person visit, especially with the new 360-degree, virtual-reality headsets. Get a discounted rate one hour before the site closes, or buy a ticket that also includes access to the Art and History Museum of Orange.