That amazing undulating roof is the masterpiece of Catalan architect Enric Miralles, who topped Barcelona’s oldest (1848) enclosed market house with a spectacular sombrero in 2001. Glazed tiles in 67 hues form the rainbow covering of la Boqueria’s rival in La Ribera, which is still a lively retail market full of fresh produce. Enclosed in glass on one side of the food market, an archaeological site run by the Museu d’Història de la Ciutat (MUHBA) includes excavations tracing Barcelona culture from the Bronze Age to present. Chief among the ruins are the Dominican monastery of Santa Caterina, established here in 1219 and torn down in the anti-clerical fervor in 1835. The interpretive site is open Monday, Wednesday, and Saturday 7:30am to 3:30pm and Tuesday, Thursday, and Friday 7:30am to 8:30pm. Admission is free.