TikTok user Josh discovered a viral underground lair in a forest, sparking speculation of its WWII bunker or experimental facility origins.

TikTok user Josh (@joshtheintern) discovered an overgrown staircase in a forest leading to an underground lair filled with tunnels and rooms. His exploration video has gone viral, with over 18 million views. Inside, he found features like toilets and a flooded tunnel with footprint marks on the walls. While he remains uncertain about the site's purpose, viewers speculate it could be a WWII bunker or an experimental facility. Josh advised against visiting such places alone.