The police station in Irun, a town on the border between the Spanish and French States compared to other police stations in the Basque Country has the highest data of arrests of foreigners in irregular situation is concerned. It is normal, since it is common to find identity police controls near the border surroundings. The place where the border barrier was once was occupied by a car toll constructed with a very particular structure: as a border, with cabins for police men. In addition, the data of border readmission between these two states, under an agreement signed in 2002, is something to look at with special attention: 6.000 people deportaed along the Northen border. 70% of the people detained in the French Detention Centre of Hendaia in 2015 were caught at the border. This case study of the Spanish-French border will put some light in a disregarded topic and object: the internal borders. Regulation in these areas is diverse. Many exceptions and specificities apply, parallel or alternatively to the ordinary immigration rules, as a matter of exception of the Law. Considering all this we need to rethink the imaginary of a borderless Europe stated by the Schengen agreement. Following Balibar in ?What is a border?? (2005) the controls multiplied all along the territory as a kaleidoscopic vision. The EU internal borders never disappeared but mutated into a police managed modelo of internal borders.