Originally Posted by
tcook052
Is the Zone #1 the one most tourists would be travelling within? I notice the T10 can be bought for more than one zone but the price climbs noticeably so if I'm unlikely to venture into the suburbs should I stick with Zone #1?
There are various radial zones for which a pass can be bought but these are only relevant for suburban train services. The entire metro system is within zone 1 as is the airport. The only reason you'd leave zone 1 is if you're planning a daytrip to somewhere like Sitges or Girona in which case you're almost always cheaper buying a standard train ticket.
Enjoy your stay