Two halves that feel like different countries. Barcelona is Modernisme - Gaudi's unfinished basilica, his failed housing estate turned public park - and it is walkable enough to do in two days if you book the timed entries before you fly. Then south. Granada's Alhambra needs its own day and its own ticket, bought weeks ahead, and the evening after it is the right time for flamenco in a room small enough to hear the floor. The train between them is four hours and worth taking in daylight.
Day 1
BARCELONASagrada FamíliaBook the timed entry before you fly. Tower access is a separate ticket and goes first.
Buy now Day 2
BARCELONAPark GüellThe Monumental Zone needs a slot; the rest of the park is free and emptier.
Buy now BARCELONAMontserratA half day out of the city. Take the cable car up rather than the rack railway.
Buy now Day 3
MADRIDThe PradoTwo hours for the highlights. Free in the last two hours, and busy for it.
Buy now Day 4
GRANADAThe AlhambraTimed entry to the Nasrid Palaces, bought weeks ahead. Bring the ID you booked with.
Buy now Day 5
SEVILLEFlamencoA tablao, not a theatre. The floor is an instrument and you want to be near it.
Buy now 5 days