Airport Lleida-Alguaire was designed by Fermín Vázquez of b720 Arquitectos. The building design consisted of two main volumes: the tower, which housed the specific functions of aircraft control and immediate services; and the base, which received the administrative, technical and storage uses. The outer walls of the control tower are the defining element of the construction. They curve to become the undulated roofs of the terminal and the garages. Each wall is made up of two adjacent and levelled strips of differing width, that break tandem to ripple in different points over the terminal – allowing natural light in – and finally wrap up at unequal distances off the end of the lower body of the building.