Deep under the pine forests of southwest Finland, the rock arrives first before anything else. It is old in a way that makes human construction feel temporary, shaped by geological time rather than anything built at the surface. According to PBS, the underground facility known as the Onkalo nuclear repository lies near Eurajoki, where nothing above ground really hints at what is happening hundreds of metres below. At depth, the tunnels feel stripped down to essentials: damp air, rock walls, cables running along uneven surfaces, and the slow echo of movement. It is not a place designed for comfort or spectacle. It is built around something far more final, the long-term handling of nuclear waste that cannot simply be forgotten or moved elsewhere.
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