Located in the vicinity of the church, along the road going up to the village is so-called the Fountain of San Costanzo. The water source was constructed in 1296 by the Perugian magistrates for the exclusive use of the people of Castello delle Forme and San Costanzo delle Abbadesse and had various functions, including supplying drinking water, serving as a laundry, and possibly, when necessary, changing into a drinking trough for animals.

Origins of the castle date back to the 12th century. Among the remains of the ancient castle are its bell tower with clock and part of its massive walls. Inside the city walls there is also a circular well, from the late 1800s, made by a local craftsman, Forasiepi Florido. It is topped by a domed roof with a frieze representing a melon or a pumpkin.