The old town of Alanno is located on a hill, which is surrounded by Aterno river and a stream named Cigno.

A reservoir (Alanno-Piano d'Orta dam [it]) on the Aterno river led to the birth of a natural reserve called Oasis of Alanno Lake [it], for the preservation of animal and plant species, including some species of waterbirds and the yellow iris.

The single nave ends with an apse with frescoes attributed to Andrea De Litio's workshop (1522) and a 15th-century triptych with Madonna, Angels and Saints.

The altar, finished in 1642, has a precious 15th century triptych with the Madonna between St. Sebastian and a Holy Pope.

Other points of interest include the three towers, remains of the medieval walls and castle, the 16th century church of St. Francis and the Wildlife Oasis of Alanno, characterized by numerous birds species and a rich river vegetation.