HORREOS

Aezkoa owns 15 of the 22 granaries Navarre, all of whom declared a Cultural. This is a very common type of construction in wetlands where the shortage of high demand a good conservation safe from moisture and rodents.
The granaries, garaiak or gareak in Basque, have quadrangular plant cover and water in two wooden slats. The set is based on pillars of stone slabs topped with circular or tornarratas, which serve to prevent the entry of rodents. In the interior, several compartments or zizku keep martxagaria or wheat sown in March, azarogari wheat or October, the most-appreciated for making bread, beans or Babak, Olo or garagarra or oats and barley.

The aezkoa horreo is a special variety, "Pyrenees", according to climate and the indigenous construction. The floor of horreo aezkoano is about 4.5 m x5, is based on 8 columns, the roof is two to waters steeply sloping snow. The walls are masonry with a door and a window in any case. The current roof was wooden tablet, as in all other constructions. The separate staircase of the building and tornarratas which supports served to prevent the entry of rodents.
Aria and Hiriberri count with four each, three in Orbaizeta and one in Garralda, Garaioa, Aribe and Orbara.

MEGALITHS

Erro is a valley rich in dolmens, constituting the second area of Navarre according to their level of concentration.

The term of Aurizberri / Espinal appears as a major focus, with a set of about ten dolmens, which are kept in good condition four: Dondoro, Artzilo, Mendiaundi and Baratzeko Erreka. Another important area is to Ardaitz, with four other sets megalithic: Ezkiregi, Oiarzabal, Ardaitz and Garbala.
Finally, one can not cite Sorogain, another area of great importance megalithic.

funerary stelae

The funerary stelae are creations of folk art that identify the graves of each house. They consist of one foot and a trapezoidal upper disc decorated many times for front, back and even singing.
The Valley has been a place rich in steles, still retain many of them in some villages, as in Orondritz.
In Aurizberri / Espinal have been recovered and catalogued 25, dating from the seventeenth and eighteenth centuries, and now make up a veritable outdoor museum.

Bridge

Erro complements its rich river with a good number of medieval bridges, an important artistic value. Significantly the beautiful medieval bridge Orondritz, along with the remains of an old mill, and those of Urniza and Larraingoa, too medieval, and one two eyes respectively. A fourth bridge, in the vicinity of this Ardaitz, saves the Erro in foz of Txintxurrimear.