Explore three extraordinarily atmospheric Old Towns on the French Riviera, where you will have free time to delve even deeper into their charms following guided walking tours. As you stroll through Monaco’s most historical area, you will see the Oceanographic Museum rising from a sheer rock cliff and the magnificent Cathedral of the Immaculate Conception, where in 1956 Prince Rainier II married Grace Kelly. Their tombs are inside. A short drive along the scenic middle Corniche will bring you to Eze, an ancient village that perches atop a narrow rocky peak along with a 12th-century castle, a testament to the village’s turbulent past. The views from there are spectacular. Continuing on to the Old Town of Nice, the capital of the Côte d’Azur, you will enjoy another enlightening walking tour. The labyrinthine streets are wonderfully atmospheric and lead to baroque churches, bustling markets and leafy squares. Free time follows, during which you can explore further.