Public showers in Barcelona

You'd be lucky to find a toilet in Sants, let alone showers.

You might have more luck in the airport but I can't say I've noticed a shower symbol amongst the signs.

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<hr>I've noticed a shower symbol amongst the signs.<hr></blockquote>

Are they not decontamination rooms, like after chemical spill or something? ;-)

There is a big line of rather wasteful fountains on the "skateboard" plaza outside Sants. Sure you´ll be able to shower there.

There are showers at the beaches, but, of course, they are open-air.

There are showers at private gyms and swim clubs like Club Natacio de Catalunya. You can usually pay a day use fee to get in as a non-member.