A promenade with a panoramic view of the Pyrenees for nearly 2 kilometres, linking the gates of the castle to Parc Beaumont and its conference centre.
From the 1820s, the mild winter climate of the city of Pau began to attract a rich clientele of foreign tourists. The arrival of the train in 1863 made it a preferred resort for the upper classes from all over Europe. In 1872, the construction of the Boulevard du Midi was completed, linking the castle to the royal place.