In the summer of 2010, I was in Barcelona for the 2010 EAGE conference.  One day I had an evening to go for a walk in town and find this WHS.  I also walked along the Ramblas and found the old hostel I stayed at during previous Barcelona trips.  This site is a pretty building from the outside, but not that impressive in my view.  

Apparently, the inside is quite impressive and the other building that is part of this WHS is quite nice as well.  I was actually a bit disappointed that downtown Barcelona does not have more sites.  This city seems to have so much old and new history that I would think there would be more interesting sites.