Barcelona in January is really lovely! Not hot, but not cold, either.
We set off after a late breakfast and took the metro (with a horrendous change in the middle, one had to walk for miles) to the big food market off La Rambla. We wandered round there, wishing we were hungry, and then came away and bought a guidebook and had a cup of coffee while we looked at it. Then we got a bus a few stops and walked to the metro station called Paral.lel (with the dot!), whence we took the funicular up Montjuic, and then the cable car right up to the top, to the castle.
And then a bus down, which delighted the Swan Whisperer by going past the Olympic stadium (don't we want rather to forget the 1992 Olympics?), and this deposited us in the Playa d'Espanya.
I don't suppose we've seen all of Barcelona, but it's a lovely place, what we have seen.