C11 Borgo medievale di Castelnuovo
Starting in Piazza XX Settembre, the trail goes down to the old “borgo”. At Porta Romana other nature trails start. Continuing down the slope, you reach Piazza del Popolo and Porta Fiorentina. Then, climbing up, you pass by the Church of the Purification and through the Chiassino alleyway, only 46 cm wide.