Looking for advice on this. We have 1 full day and half of another one in Barcelona before getting on a cruise. (Coming in the day before the full day, but won't need metro tickets for that). We want to get from Liceu station to Casa Botllo (Passieg de Garcia). While this is only a 20 minute walk, we will be very busy this day and need to conserve energy. After touring Casa Botllo, we are heading to Park Guell. Looking on google maps, Vallcara is the station to get off and then a 10 minute walk. I read about bus Guell, but is that only on the other entrance? We are doing the monument part, but not Gaudi house. Probably get some lunch...La Torreta del Park Guell jumped out but open to suggestions. Then it's on to Sagrada Familia, which looks to be about a 30 minute trip. After that, it's Basilica Santa Maria del Mar. (yep, busy day! My kids are 17, 10, 10 and 7 and have good stamina as long as I hold churros out in front). Finally back to Liceu.
After that and maybe some dinner, barring a revolt, we might go to Montjuic to ride the cable car and walk around the fort. I think they would like the experience of the funicular as well.
The next day we would probably walk to tour Palau Musica, but are debating about the cable car over the port (worth it? Thought it might be cool to see our cruise ship that way).
So with that long windedness...what is my best metro/bus ticket purchase option?