Hi.... webpage has been updated and they point "only Friday". Last time I visited it was daily   Please, get in contact with Barcelona tourism office to know dates of visit when you are moving to Barcelona.   In addition, if you write about your possibilities, I can suggest you more points to visit. This is... this tour is just 600m, plus a short walk from/to the underground (you can entry that underground even on a wheelchair). Can you walk for longer distances?