The 60 feet long message was created by Bamburgh Castle maintenance manager Andrew Heeley on his daily exercise while on lockdown at the iconic fortress.
The castle has also raised a ‘thank you’ NHS Union Jack.
Francis Watson Armstrong, castle owner, said: “We are proudly flying a thank you NHS flag high from magnificent Bamburgh Castle as a fitting show of respect and gratitude for their heroic and brave efforts.
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A giant sand art message of support to the NHS on Bamburgh beach.
“What you are doing is superhuman and we want to say thank you from the bottom of our hearts - as well as the very top of the nation's best-loved castle.”
Although the attraction remains closed to the public due to coronavirus, the venue is busy working on its website and social media content so it can still be enjoyed by online audiences.
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The flag is raised at Bamburgh Castle.
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