In March 2025 I have an extended itinerary that centers around a previously scheduled birding trip to Southern Spain and the Canary Islands. That trip organizer has the itinerary set, provides all the driving and sets the pace. The trip departs from Seville, so I want to spend 3 days there before the group arrives, and when the trip ends in Madrid, spend 3 days there. Lastly, I plan to train to Barcelona and spend 3 days before returning to the States. All told, with flights and travel days I will be away about a month. I have done preliminary research on each city. I will be solo for Seville, Barcelona and maybe Madrid.
QUESTIONS: Are there opinions about how much time to spend in each of these cities? I am not fixated upon Barcelona, and wondered if I should pick another city in that region. But, then flying out at the end of the trip would not be as convenient. This is a long time to be away, would you pare down any of the cities, as the birding piece is fixed?
What is your favorite thing you have experienced in any of these cities, and what would you skip?
On my solo cities (Seville and Barcelona) would you join a tour group to visit the key sites and organize your own tickets?