I had seen the Sagrada Familia in 1998 but not on the inside (there was little to see at that time). I went back to Barcelona this summer and bought tickets online in advance to see the church from the inside. I was glad I bought the tickets in advance because there was a long queue at the ticket office. I spent 3 hours inside to enjoy this amazing building. I think you can do it in less time but there was so much to see and the atmosphere was so nice that I stayed as long as I did.
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