where to store your luggage after a Barcelona cruise

The airport itself has safe, cheap luggage lockers. I don't know if it will be worth your time to go to the airport, store the bags, return to the city and then have to return to the airport, however. What time do you land in BCN?

Georgette...the Barcelona Maritime Museum is just a few steps from the Christopher Columbus monument at the bottom of the Ramblas. It has large, medium, and small coin-operated lockers in the foyer, so anyone can wander in to use them (altho I really liked the museum!) It's located on Avinguda de les Drassanes, just a few meters west of the bottom of the Ramblas. Go to maps.google.com and enter the following coordinates (41.375859, 2.175604), click on the Satellite button, and you will see an excellent satellite shot to locate yourselves to the entrance. Take the metro (literally across the street) up to Placa de Catalunya and wander back down the Ramblas.

¡Great answer, Norm! I guess we all learn something new every day. I'll have to keep this one in mind.

By the by, for those who haven't used the train to the airport in the last 8 months or so, the line has been changed. The train from Pza. Cataluña no longer goes directly to the airport. Now, one must go to Sants (one stop up from Pza. Cataluña) and change to the airport train. A bit of a hassle, but not all that big a deal.

would it be easier to just take the bus to the airport from plz. cataluna

The bus depends upon traffic conditions, and as such is a bit more hit and miss. I prefer the train, which runs on a (more or less) reliable schedule. On the other hand, the bus will give you an opportunity to sightsee, while the train just gives you a view of the inside of a tunnel.