On a hill in Montedor stands a lighthouse of the same name, built in 1910; its 3rd order illuminator has white light with rotation, giving a group of three flashes every 10 seconds; reaches 26 miles in clear weather.

The tower of this lighthouse has a squared section and measures 22 meters in height, with the focus at 102m, 37 above sea level; crosses with the lighthouse of the Cias Islands, at the entrance of the Vigo estuary, and with the end of the river douro bar, in Porto. (Marquis d'Ávila and Bolama)