We would be getting off in Córdoba, sightseeing that city, and then getting back on a later train following the same route to take us to Sevilla. This actually required extensive pre-planning, as these high speed train tickets can be had for a 70% discount if you book them immediately when they go on sale 60 days in advance. Which meant we needed to decide 2 months out exactly how much time to spend in Córdoba, so we could book the correct onward train.