The Aizkomendi Dolmen, located in the municipality of Egilaz, in Araba, is one of the most significant megalithic monuments in the Basque Country. Dating back to the Neolithic period (approximately 3,500–2,500 BCE), it is a prehistoric burial site that provides valuable insight into the funerary customs and social organization of early human communities in the region.

The structure consists of a large burial chamber built with upright stone slabs (orthostats) and originally covered by a mound of earth and stones (tumulus). The chamber, which once contained collective burials, is accessed through a short corridor, a typical feature of corridor dolmens. Over time, erosion and excavations have left the stones of the chamber exposed, but its original form is still recognizable.

The site was excavated in the 20th century, revealing human remains and various burial offerings, such as ceramic fragments, stone tools, and decorative items. These findings indicate that the dolmen was used for extended periods, possibly serving multiple generations of the local population.

Today, the Dolmen de Aizkomendi is easily accessible and marked with informational panels explaining its history and significance. It is part of the extensive megalithic heritage of Araba, which includes numerous other dolmens, tumuli, and menhirs scattered throughout the region. Visiting the site offers an opportunity to explore one of the earliest manifestations of prehistoric architecture in the Basque Country, set in a landscape of great natural beauty.