June 6 takes the group out of Seville, across the Guadalquivir basin to Córdoba for the Mezquita-Catedral, then up into the Sierra Nevada foothills to Granada. Two of the highest-density days in all of Iberia, history-wise. Background to load now so it lands at the right time.
Córdoba — the city that was the largest in Western Europe in the 10th century
Under the Caliphate of Abd al-Rahman III in the 900s, Córdoba had roughly half a million people, a library of 400,000 volumes, and street lighting — at a moment when Paris had maybe 20,000 people and most of Europe was reading by candle, when it bothered reading at all. That's the lens to bring to the Mezquita.
Mezquita-Catedral talking point: Begun in 785 by Abd al-Rahman I, expanded by his son and grandsons for two centuries. The "forest of arches" — 856 columns of jasper, granite, and marble in red-and-white horseshoe stripes — borrows the trick from Roman aqueduct construction (stack two arches to span a wider gap with shorter columns). The bizarre part is in the middle: in 1523, three centuries after the Reconquista, Carlos V let the local clergy gut the center of the mosque to drop a Renaissance cathedral into it. Visiting the site, he reportedly told them: "You have built what you or others might have built anywhere, to do so you have destroyed what was unique in the world." Few sentences from a Habsburg king have aged better. Mezquita-Catedral background
Tip for the visit: the Judería (Jewish quarter) walking tour is genuinely good, but the alleyways are narrow and pickpocket-prone in summer. Wallets in front pocket; phones not in back pockets.
Granada — last Moorish kingdom in Iberia, surrendered the same year Columbus sailed
Granada's the bookend: the Mezquita is what al-Andalus built at its peak; the Alhambra is what it built when it knew it was running out of time. The Nasrid dynasty held Granada as a tribute-paying vassal kingdom for 250 years after the rest of al-Andalus had fallen. On January 2, 1492, Muhammad XII (the Spanish call him Boabdil) handed Ferdinand and Isabella the keys. Three months later the Catholic Monarchs signed the Alhambra Decree expelling Spain's Jews; six months after that they signed Columbus's contract. All of it from the same rooms you'll walk through on Day 7.
Albaicín talking point: the white-walled Moorish quarter across the ravine from the Alhambra survived not because anyone protected it but because nobody could be bothered to bulldoze hillside streets too narrow for horses. UNESCO World Heritage now. The viewpoint at Plaza San Nicolás is the postcard shot — the Alhambra catches the late sun while the Sierra Nevada glows pink behind it. Walk up at sunset if energy allows.
Practical note for Day 7: the Alhambra visit is the trip's hardest stop to do twice if you miss something. Slow down at the Court of the Lions — the 12-lion fountain is the only place in Granada where Islamic iconography of living creatures survives in a major architectural element, which is itself a sign of how powerful the Nasrid court thought it had become.