In Reykjanes. Where the tectonic plates meet.
Doormant for 800 years, but Reykjanes means Smoking Land. Reykja-vik; Smoking Bay. So the Icelanders lived with it before.
https://grapevine.is/news/2024/11/21/photos-blue-lagoon-parking-lot-covered-by-lava-flow/