The Castle of Monterosso is more of an archeological site than a still-standing structure. Only certain elements of the former edifice are visible today, such as parts of the walls and four towers (three circular towers and a square tower). The castle used to be part of the defensive system built by the Genovese during the Middle Ages, along with plenty other historical edifices, of which the Aurora Tower is the most notable.
Along with the said Aurora Tower, the Castle of Monterosso delineates the border between the old part of Monterosso and the new district, Fegina.