From radioactive ruins and hidden virus vaults to sealed tombs and underground tunnels, these places remain off-limits because what lies inside is too dangerous ...

Energy expert Matthew Cruise said the contamination incidents at Koeberg were minor and posed no risk to the public.

Explore 25 massive landmarks built to bury dark historical secrets. From radioactive lakes sealed in concrete to grand ...

Mochovce 4 nuclear reactor in Slovakia entered physical start-up testing on July 20, 2026, after its vessel was sealed — the ...