Santiago de Compostela is famous for the cathedral, but after midnight, the old quarter transforms. The "crawling hot" aspect is literal here: you crawl (walk slowly) through alleyways so narrow that body heat gets trapped. Bars like A Reixa and O Bispo have no air conditioning. The heat is oppressive. That is the point. FU10 believers say, "If you aren't sweating through your linen shirt, you aren't doing it right."
The magical night of San Juan in Galicia: tradition, bonfires and rituals fu10 the galician night crawling hot
FU10 is not an event. It is a feeling. It is the moment you realize that the hottest nights aren't found under air conditioning. They are found on the wet, warm stones of Galicia, surrounded by strangers who, by sunrise, will feel like family. Santiago de Compostela is famous for the cathedral,