National Trust plans £1m play area at Belton House
Almost £1m is expected to be spent creating an indoor play area at a Lincolnshire tourist attraction.
The National Trust said it wanted to build the new facility at Belton House, near Grantham, to give visitors something to do during wet weather.
The Trust said it was spending £6.5m on the property over the next few years.
A new visitor reception building has already been built and the existing outdoor adventure playground, which was built in the 1970s, will be upgraded.
Alec Gordon, the Trust's general manager in Lincolnshire, said the outdoor adventure playground was a big draw for the property.
"Over the years generations have used it. It really is a fundamental part of what Belton has to offer families.
"From next year we'll be open 364 days a year and we have to consider that important segment of our visitors, the families, that come here to use Belton and we've got very little to offer them when it rains."
The Trust has submitted a planning application for the new playground which, if approved, will be built at the property's former riding school.
The area is currently used as storage and measures about 3,000 sq ft (278 sq m).
New catering facilities, toilets and shops will be created as part of the project.
The property attracts about 250,000 visitors each year.