Features of interest include some 12th century fortifications, woodland habitats, wetlands and rolling grassland.

Built on an older 7th century fortification, the castle is known from 987.

Of the 19th century fortification at the foot of the hill, only remainders are still visible.

Remains of the 10th or 11th century fortifications.

The gate is adjacent to the west wall of the Flat Bastion, another 16th century fortification.

The 13th century fortification on a rocky outcrop was abandoned for a more comfortable house built in the 16th century.

Castillo de San Jose, 17th century fortification that now houses a collection of modern art.

The site was originally a 14th century fortification, founded by the Hay family.

In early 20th century fortification, the enceinte was usually simply the innermost continuous line of fortifications.

Although the north facade includes 13th century fortifications, the building has been restored several times during its history.