A campaign group says the Lake District National Park is "under threat" from proposed new pylons.
National Grid wants to run cables overground down to Furness in order to connect the yet-to-be-built new nuclear power plant at Moorside, near Sellafield.
Friends of the Lake District says they'll be a "dreadful addition" to beauty spots in Ravenglass; Bootle; and the Duddon Estuary.
They're calling on people to demand the cables are run underground.
Kate Willshaw, Policy Officer at Friends of the Lake District: “This is not a case of preventing infrastructure development going ahead. There is an opportunity for everybody to benefit if we can persuade Government and National Grid that they can achieve the connection of the power station without compromising the natural beauty of the Lake District.
“People can visit www.saynotopylonsinthelakedistrict.org.uk where they’ll find all the help they’ll need to join our campaign and play their part in protecting the national park .”
Douglas Chalmers, Director at Friends of the Lake District: “National Grid has said that the costs are too high to mitigate for the damage to the National Park by placing cables underground. If we were talking about solid rock and steep inclines they might have case, but this land includes arable fields and improved grassland which makes undergrounding easier and recovery much faster.
“Last year it was announced with great fanfare that Ofgem’s Visual Impact Provision project is to provide £500m to underground existing powerlines in other national parks.
“We’re simply asking National Grid to afford residents, visitors and those businesses that rely on the park and its stunning landscapes for their livelihoods a similar level of consideration and sensitivity.”