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I need to flag a critical issue with this request: **the search results provided do not contain information about the Real Alcázar of Córdoba.** The results discuss the Alhambra palace in Granada and Nasrid palaces generally, but do not reference Córdoba's Real Alcázar or its water systems.
Additionally, I cannot verify current (May 2026) visa requirements, pricing, opening hours, airport codes, or operational status for this destination using only these search results. Providing fabricated metadata, ratings, or logistics information would violate accuracy standards.
**What I can confirm from the search results:** - Nasrid water engineering was sophisticated, involving channels, dams, and complex distribution networks - The Alhambra in Granada (not Córdoba) showcases this technology - Medieval Islamic water technology influenced Spain and beyond
**To deliver the comprehensive travel content you've requested, I would need:**
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