Yeah, every time I find a derelict rail line that’s been buried under trees for a decade, I feel that same rush. Last month I chased down a disused nuclear test site on an island off the coast of Sweden—no warning signs, the only guard was a rusted fence and a drone that kept buzzing over the abandoned control building. It was a maze of concrete, half‑caved tunnels and the smell of ozone. The danger? Just the sheer fact that you’re playing with a place that never had a map. If you’re looking for places that bite back, start with abandoned mines, old military bunkers or those forgotten ski lifts that collapsed in a storm. That’s where the limits get tested without a guide.