M. S. Factory, Valley in Rhydymwyn
Following years of secrecy, the hidden history of a World War II site is being brought to light.

📜 Former World War II chemical weapons factory and storage facility.
🔍 Site of early UK atomic bomb project and mustard gas storage, now a nature reserve.

Why Go

🗺️ Explore a historically significant WWII site
🌳 Visit a nature reserve
🚶 Discover underground tunnel system (with tour)

Why Avoid

🚫 Tunnels access strictly limited to tours
☢️ Building P6 interior inaccessible due to contamination

Tips

📍 Located in an isolated area of North Wales.

Last updated 6 days ago

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