The village of Prela is now reduced to a few houses, a row of buildings almost entirely restored by foreign owners who understood the value of the country years ago. The houses are compressed between the ruins of the ancient castle and the church of SS. Giacomo and Nicolò, which closes the village downstream. This place took its name from the "petralata" that is the large stone on which the feudal lords had built the fortress several times destroyed and rebuilt.
The castle, placed to guard the via Marenca, which connects with the via del Sale, was demolished after the last Genoese reconquest.
Antonio Doria in 1340 destroyed the castle of Prela Soprana from the very foundations; the castle itself was later rebuilt further down on the rocky spur, where the remains of the four semicircular towers can still be seen today. The massive construction with huge irregular stone blocks, a wall and a contiguous tower, have some slits in the upper part and traces of internal stairs for the disengagement of the various floors and environments.
The external tower was connected to the castle; according to popular tradition, the various "colombere" or watchtowers located in the surroundings were also connected by means of tunnels. Since the early 2000s it has been owned by a German private individual who is taking care of its restoration.
The church at the end of the village, recently restored, stands on a mass of overlapping rocks segregated from each other so as to leave interstices and underground caves, which, pushing under the floor of the church, form a kind of impracticable and deep underground, within where until 1845 the dead were laid, through a hole in the center of the floor of the main nave. Inside there are decorations, stuccoes and a complete organ from around 1700. The church is the matrix of all the others in the valley (i.e. the one that first generated all the other churches, making new copies of the original sacred scriptures)