Barcelona: Now for something completely different!
If you are doing a Western Med cruise that starts or ends in Barcelona you might want to consider taking the train up to Figueres to the Dali Theatre. This is how Salvador Dali chose to have his works preserved. You can do this as part of an organized tour or jump the train yourself. The high speed train gets there in about 90 minutes but leaves you a couple of kilometers out of town. The MD train is a little slower but leaves you downtown, an easy 1K walk to the museum though you might need to make this an overnight.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014, 2016
Sail Windjammer: Mandalay 2017
Star Clippers: Royal Clipper 2015