São Jorge Castle (Castelo de São Jorge) is one of Lisbon’s most emblematic landmarks. The silhouette of the Castle stands out both by day and when illuminated at night, located on the summit of São Jorge hill, the highest in Lisbon. The hillside also houses two of the city’s neighbourhoods called Alfama and Castelo.
"Here's my complete guide to visiting Castelo de São Jorge, St. George's Castle, in Lisbon. A truthful guide. St. George's Castle is Lisbon's most recognizable landmark. But it's a fake. Yes, it's a fake. You read that right."
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https://www.thegeographicalcure.com/post/castelo-de-s%C3%A3o-jorge-lisbon-s-fetching-but-fake-castle