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The extensive university, constituted in 1254, has departments and campuses across the city but the area to visit is the old core of it close to the cathedrals. Admire the elaborate facade: kudos comes to those who can spot the frog unaided. Richly appointed rooms within, highlights being the library, the grand staircase, and the Hall of Fray Luis de Leon.
Santa Iglesia Catedral
The two buildings are joined and you enter from the north side into the New Cathedral, built 16th-18th century. Outside, note the fine Puerta de Ramos, mostly Renaissance but among its saints are an astronaut and an imp clutching an ice-cream cone. The interior is a baroque / Churrigeuresque creation, with fine ceilings, choir and main chapel. A door leads down into the Old Cathedral, 12th century and mostly Romanesque, with many frescoes.
This is now a museum of medieval art, highlight is the Gothic frescoes.
The best of it is the grand exterior. Many visitors reckon it's not worth paying to see the ostentatious interior and endure the interminable audio guide.
Contemporary art in a former prison.
Displaying the history of commerce and industry hereabouts. The best sections are about the impact of radio.
Displaying fifty 20th century motorbikes.