Caelian Hill is one of the original Seven Hills of Rome and a pleasant escape from the bustle of the city. Across the region are churches, orchards, and the green lanes of a lesser-known park in Rome, Villa Caelimontana. It welcomes the casual visitor into a setting largely untouched since the 19th-century. However, Caelian Hill is rife with history and lesser-known monuments. Attentive visitors who walk from the Colosseum will notice the colossal arcades of the Aqua Neroniana and the aqueduct that Nero constructed. Following the arcades up the hill…