Sant Pau is a hospital built as a village. Twenty-seven separate pavilions stand in gardens rather than one large block, each covered in ceramic, mosaic and carved stone, with domed roofs and sculpted portals, on a scale nobody has attempted for a hospital before or since. Underneath, about a kilometre of tunnels connects them, so a patient could be wheeled from one building to another without being taken out in the rain. Lluís Domènech i Montaner designed twelve of the pavilions and his son continued after him.
They went up between 1902 and 1930, on the theory that air and light cure people and that infection has further to travel between free-standing wards. The hospital worked here until 2009, when it moved into a modern building next door, and the site opened to visitors in 2014 after five years of restoration. Some pavilions are offices now and closed. What you walk through is a garden of interiors: tiled wards with vaulted ceilings, coloured glass, and rooms built for two dozen beds that now hold nothing at all.