The Eden Project site is closed to visitors today due to a burst water main.
A spokesman said: "While the Biomes are unaffected, we temporarily have no drinking water or hot water, which is why we have made the decision to close Eden to visitors today.
"We are working to fix the problem and will give regular updates through our phone lines and the website: www.edenproject.com.
"We expect that Eden will be open tomorrow are advising visitors that the nearby Lost Gardens of Heligan are open today."
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