Council chiefs have been accused of turning an Iron Age hillfort into an 'eyesore'
The 80-feet-high Castle Hill at Thetford, Norfolk, is believed to be one of the tallest and steepest Iron Age fort sites in the UK.
But now the ancient site features a newly-constructed £65,000 staircase to its mount.
Matthew Spencer, a retail worker who lives near the hill, said: "It couldn't be worse to be honest. It's an eyesore.
"I think steps could be a good idea for access but how they've done it is terrible.
"The material looks horrible. They should have used something more natural.
"I think they've ruined how it looks.
The 80-feet-high Castle Hill at Thetford, Norfolk, now features fibre-glass steps on it.
"It's ugly and over-modern. Just not a good look."
It's ugly and over-modern
Further people spoke about the new stairs online.
On social media Gary Connelly said: "It looks like a huge scar on a beautiful face to me, an act of vandalism."
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Another asked what would happen if someone suggested similar at Stonehenge.
How Castle Hill looked before the steps
Steve Tarley Burkey's posted: "This is a very bad idea that should not have been implemented at all. Archeological sacrilege!!!!! What next? Flatten Stonehenge?? Fill in grimes graves?? 1,000 years of Thetford history defaced by a galvanised staircase!"
Thetford Town Council defended the installation and said the steps are made of composite fibre glass, not metal.
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Matthew Spencer, a retail worker who lives near the hill, called the addition an 'eyesore'
Wooden steps would have required more foundations and had 'greater need of costly maintenance and replacement' a spokesman said.
A spokesman for Historic England said: "While we accept the steps will change the visual appeal of the site, they also bring significant benefits in terms of increased public access and better management."
A petition has been set up on Change.org called "Better looking steps for Castle Hill in Thetford" which has received hundreds of signatures.