Visit the BARRIO GOTICO (Gothic Quarter) at night, It's amazing...antique and dark...buildings are huge and grey... it's so mysterious... There is a square: PLAZA DEL REY, placed @ the old JEWISH neighbourhood; it is said that THE CATHOLIC KINGS welcomed COLUMBUS there when he came back from AMERICA.
I took a picture, but it was so dark nothing can be seen!
At the Pl. de Sant Just, in front of the St Just i Pastor church, in the Gotic Quarter you will find a lovely fountain. Three heads deliver the water.