A family’s beach day in Burry Port, Wales, nearly turned tragic when their kids unknowingly played on a World War II bomb.

Kelly Gravell and her two young children, Erin and Ellis, had been jumping on what they thought was a seaweed-covered buoy. Days later, rangers identified it as a 70-year-old unexploded mine buried in the sand.

A bomb squad safely detonated the device, and dramatic footage captured the controlled explosion. The children’s father, Gareth, tweeted with stunned relief, “So the buoy my kids were jumping on all weekend turns out to be a WWII bomb. Oops.”

Kelly later admitted, “We were very close to disaster — it’s shocking.” Though shaken, the family plans to return to the beach, now with much more caution.

Local officials assured the public the area is safe and urged visitors to report anything unusual. It was a chilling reminder that history can still lie just beneath our feet.