Cardona is a town ìn Catalonia, Spain, in the province of Barcelona; about 90 km (56 mi) northwest of the city of Barcelona, on a hill almost surrounded by the river Cardoner, a branch of the Llobregat. To the east of the town, the river has been diverted through a tunnel has been dug through a spur, leaving a loop of dry river bed near the saltmine.
Near the town is an extensive deposit of rock salt. The salt forms a mountain mass (called Muntanya de Sal) covered by a thick bed of a reddish-brown clay, and apparently resting on a yellowish-grey sandstone. It is generally more or less translucent, and large masses of it are quite transparent. The hill has been worked like a mine since Roman times; pieces cut from it have been carved by artists in Cardona into images, crucifixes and many articles of an ornamental kind.
The Church of Sant Miquel, built in the 11th century and rebuilt in the 14th century in Gothic style. It houses a precious polyptych by Pere Vall, depicting St. Anne, the Virgin and St. Amador, and a 15th-century baptismal font.