The km reported refer to the route from Acquaviva di Nerola to Ponticelli di Scandriglia. Despite the fact that it lengthens the journey, this alternative allows you to visit the abbey of Farfa, one of the most important Benedictine monasteries in Italy. The journey leading from Monterotondo to Acquaviva di Nerola coincides with the main itinerary of the Monterotondo-Ponticelli di Scandriglia leg.
From Acquaviva, a district of Nerola, you should be careful at the junction directing you to the abbey of Farfa. A progressive uphill climb leads to the outskirts of Fara in Sabina. The journey continues downhill until you reach the abbey of Farfa (18.8 km from Acquaviva di Nerola) and it is advisable to make stop around here. A visit to this splendid abbey is recommended. This alternative route continues, touching on the locality of Toffia.
Once you reach the junction that directs you to Ponticelli, you can decide whether to go back towards the South and stop off at Ponticelli (21.2 km from the abbey of Farfa) or continue on, until you reach Poggio Moiano (23 km from the abbey of Farfa).