People are to be offered the chance to climb part of the scaffolding at York Minster to look at restoration work close up.
Visitors will get to see work on the cathedral's South Quire Aisle, some 98ft (30m) above ground.
The event, on 8 September, is part of the national Heritage Open Days scheme.
There will also be opportunities to meet the people responsible for the maintenance and conservation of the 800-year-old building.