Torre Trappola, Medieval defensive tower in Grosseto, Italy.

Torre Trappola is a brick tower near the Ombrone River with a truncated pyramid base and quadrangular section extending upward through two additional levels. The structure was designed to serve both defensive purposes and storage needs for goods and supplies.

The fortification dates from the medieval period, when it guarded a river port near the mouth of the Ombrone. The complex then included the present building, the old salt pans, customs and warehouse buildings with a small tower, a curtain wall and the church of Sant'Antonio da Padova alla Trappola. It remained intact until the second half of the 18th century, when salt production ceased, the secondary tower and curtain wall were demolished and the church suppressed; the complex then served only as a customs post until its closure, and it is now privately owned.

The complex included the church of Sant'Antonio da Padova alla Trappola, suppressed in the second half of the 18th century along with the salt works. The name Trappola refers to the marshy area around the tower, between Principina a Mare and the Ombrone mouth. The building is now privately owned and closed to visitors.

To reach the tower, you need to climb an external staircase that leads to an arched entrance portal on the raised ground floor. It is helpful to wear comfortable shoes, as the historical structures have uneven surfaces.

From the tower, the Castel Marino and Collelungo towers can be clearly seen, since it was built within a line of sight of both. The medieval complex also included salt pans, a customs and warehouse building, a curtain wall and the small church of Sant'Antonio da Padova alla Trappola, all demolished or suppressed in the second half of the 18th century.