This building gets its nickname, Casa de les Punxes, from the spikes (punxes) of its neo-Gothic roofing, the preferred style of its architect, Puig i Cadafalch. To build it, he drew on a series of technological innovations, including for the metal structures. The visit walks you through a series of empty rooms, before you come to the impressive roof terrace, where there are spaces dedicated to the architect's life and style.