All the directions on the Viator Museum Pass had everyone in town thoroughly confused.
First place to pick up the pass was the airport, she said we now need to pick it up from one of the actual museums. Went to a museum (Joan Miro Museum), they said you had to pick it up from Tourist Info Centre (which was nowhere near where we were). Museum manager was kind enough to talk through the confusion he had already with this pass, he said the only place now to collect it from was the Tourist Info Centre. He was kind enough to let us into the museum, after all the confusion. We were so grateful to him!
Same thing happened at another museum, but I wouldn't rely on this goodwill. Viator need to communicate properly the ACTUAL locations that will give you this pass, as it is meant to save you time not take it away from your holiday!