Could you please clarify for me? After spending the full 90 days in Spain, how long must I wait before I am eligible to return? Also, I'm curious about what consequences arise if I exceed the 90-day limit? I understand that it's imperative to depart Spain or any Schengen country promptly to avoid severe penalties. But once I've departed, will I be unable to return to Spain or the Schengen zone without a visa for an entire additional 90 days? Could you please provide further details on this matter?