A place to take a break and enjoy some peace. Arce, Lumbier, Romanzado, Urraules, Lónguida, Unciti, Izagaondoa.
 
Ravines
These are cut by rivers flowing through limestone. The vertical walls are carved by the eroding force of rivers as they find their courses over millions of years, giving rise to these spectacular formations...
Palaces and castles
Symbols of nobility and power, there are excellent examples of castles, palaces and towers in the Pre-Pyrenean basins. In the rural environment, the distinction between castles and palaces is not at all clear. Castles,...
Izaga
The Peña de Izaga is in the Valley of Izagaondoa, to which it lends its name. It is, in fact, a very generously proportioned mass, whose summit, which shares the same name, reaches an altitude of 1360 m. From the summit,...
 
Ravines
These are cut by rivers flowing through limestone. The vertical walls are carved by the eroding force of rivers as they find their courses over millions of years, giving rise to these spectacular formations so characteristic of the Pre-Pyrenean basins.

Inside these ravines, locally known as “Foces” (sing. “Foz”), the elements join forces to create special environments: vertical walls, shelves, slopes, stones, riverbanks.
Shelter from the winds of winter, shade in summer and humidity from the river itself are just some of the factors which condition the appearance of the wide range of interesting vegetation peculiar to ravines: kermes oak, strawberry trees, maple, service berries, beech, cherry, lime, walnut trees, elm, ash and willow. Together, they provide a spectrum of undeniable beauty which varies from season to season.

The shelves and walls remain inaccessible, protecting endemic flower varieties which have found refuge in the ravines for millions of years. There is also a wide range of wild animals. Of particular note are the birds of prey and nesting species which live on the rock face: lammergeiers, vultures, Egyptian vultures, golden eagles, peregrine falcons, eagle owls, stock doves, choughs and swifts.
Due to their natural wealth, the ravines are protected areas and those visiting should respect them as they deserve. The roads which line them, the Arbayun viewpoint or the path through the Ravine of Lumbier are all ideal ways of coming into contact with these wonders of nature. The Ravine Nature Interpretation Centre in Lumbier should not be missed.

There are several ravines in the Pre-Pyrenean basins: Iñarbe, Gaztelu, Txintxurrenea, Arbayún, Lumbier and Ugarrón. They are all legally protected due to their interest in terms of nature and landscape.
 
   
 
Palaces and castles
Symbols of nobility and power, there are excellent examples of castles, palaces and towers in the Pre-Pyrenean basins. In the rural environment, the distinction between castles and palaces is not at all clear. Castles, built for defensive purposes, become palaces when they possess some kind of sumptuousness or luxury for the pleasure of the lord or king. The best examples are:

o The fortified palace of Liberri near Aos. Built in the XIV or XV century and reformed in the XVI, this ancient estate preserves its old, ashlar tower.
o The palace and tower of Ayanz (Longuida), similar in design to the one in Liberri. Both are good examples of late-Gothic Navarrese palaces.

 
   
 
Izaga
The Peña de Izaga is in the Valley of Izagaondoa, to which it lends its name. It is, in fact, a very generously proportioned mass, whose summit, which shares the same name, reaches an altitude of 1360 m. From the summit, beside the Chapel of San Miguel, good views of the valleys and at its foot, a host of possibilities: walks, mountain-biking, heritage, etc.
 
   
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