The walls surround all the town of Morella. Although they have an origin previous to the conquest of James I, the present wall dates back to the 14th and 15th centuries with some modifications in the 18th century in the upper part, now there are loopholes. There are 2 km of wall, crossed by 7 gates and 10 towers some of them now lodge different museums.
The gate of Saint Michael, Saint Matthew, Forcall, the gate of the King, where James I entered into Morella; the Iron Gate, the place Blasco de Alagón used to enter when he conquered the town to the muslims; or the Fridge Gate, placed near an ice well where snow was kept. These walls are between 10 and 15 m of height and 2 m width. The walls cut the size of Morella, crowned by its castle.