My tip“Entry to the upper platform is free; the guided tour among the ruins is for a small fee. Closed Monday.”
Beneath an iron-framed 19th-century market hall, entire neighbourhoods of 1714 Barcelona are revealed: streets and houses demolished after the city fell in the War of the Spanish Succession to build the Ciutadella fortress. Real urban archaeology beneath your feet.
What to see
Ruins of 1714 streets and houses underground · exhibitions on the siege of the city · the 19th-century iron roof of the market · the nearby Ciutadella park · the Basílica de Santa Maria del Mar
Address
Pl. Comercial 12