Monte San Calogero, Limestone summit in Termini Imerese, Italy.

Monte San Calogero is a limestone summit in the province of Palermo, situated between three towns with views of the Tyrrhenian Sea stretching from the peak. The mountain displays different rock layers and features interesting geological characteristics at its base.

At the eastern base stands a thick prehistoric wall called Mura pegne, which once protected an ancient settlement. This structure shows that people occupied the location in very early times.

The name Calogero comes from the Greek kalogeros, meaning "beautiful old man" and used for hermits or monks. Tradition holds that the saint lived in the rocks and left his footprint there while driving out demons. Some scholars identify him with Theoctistus, a Basilian abbot of Caccamo who lived in the 9th century.

The ascent is demanding and requires proper equipment and good physical fitness, especially when hiking through limestone and rock formations. Visitors should bring sturdy footwear and plenty of water.

A small chapel dedicated to Saint Calogero crowns the summit, and once housed a stone statue of the saint. This statue later vanished into a nearby ravine called Canalone del Diavolo.