The European Integration is an ongoing process and not all part of Europe are at the same level within the process.
While we have the Eurozone, which is the most integrated area (all territories within share currency, borders, High Court of Justice...), other areas have different levels:
- UK is in the EU, but does not share currency nor borders
- Andorra is not in the EU but shares borders and currency
- Norway is not in the EU but shares borders, but not currency
- Denmark is in the EU and shares borders but not currency
- Ireland is in the EU, does not share borders but shares currency
Until the unification process is finished (and it can take a couple of centuries) we will have plenty of exceptions to the general rule.
In the case of the Canary Islands, while being part of Spain, they are not part of the Customs Union, and have a different Taxation for import and export.
For more info, check out
https://www.youtube.com/watch?v=O37yJBFR...
While the Canary Islands are part of Spain, they are not part of the EU Customs territory. So travellers do not pay VAT on goods purchased there.
Last I knew they were part of Spain.
No