"Home to more than 15,000 graves and spanning more than 10 miles, the Catacombs of St. Domitilla is one of ancient Rome’s biggest and best-preserved underground cemeteries. If facing a cemetery this big is a little daunting, fear not: the tour guide (included in the ticket fee) will run you through the best spots during the walk-through. Unlike the catacombs at Callixtus and Saint Sebastian, Domitilla is a little off the tourist path, and benefits from fewer crowds—a boon when you’re navigating with kids in tow." - Maresa Manara