Hidden gems in Barcelona

A collection of lesser-known Barcelona sites focused on Montjuïc and nearby districts: a 19th-century cemetery with over 150,000 graves and notable funerary sculpture, a museum displaying historic funeral carriages, several formal and acclimatisation gardens on Montjuïc, small public artworks and fountains, a royal palace set in extensive gardens, a national supercomputing research centre housed in the former Capella building, and scattered archaeological ruins.