Spy through the keyhole this summer at National Trust properties in Cambs, including Peckover House in Lode

Sky through the keyhole this summer at National Trust properties across Cambridgeshire. (Image: Archant)

But you can forget all about butlers and chambermaids sniggering at the Lord of the Manor’s bedroom door, because these keyholes come with a difference – they’re outdoors.

Sky through the keyhole this summer at National Trust properties across Cambridgeshire. (Image: Archant)

A spokesman said: “The Trust wants to encourage more people to enjoy the delights of its wonderful gardens and green spaces, so will be giving visitors special cards featuring large keyhole shapes in the middle.

Anglesey Abbey (Image: Archant)

“By placing the card in front of a camera or mobile phone, it can be used to frame a great garden view or stunning bit of scenery – giving the impression it is seen through a keyhole.

“We’re then encouraging visitors to share their photos on social media using #UnlockYourSummer.”

Anglesey Abbey’s gardens are a treasure trove with many different areas to explore. The gardens have a cultured atmosphere, with statues inspired by classical history dotted around the grounds.

The initiative is also running at the Wimpole Estate, south of Great Cambourne, and at Peckover House, in Wisbech.

The Wimpole Estate has a walled garden, packed with colourful and unusual plants and flowers. The greenhouses grow all kinds of interesting things – including black tomatoes!

There’s parkland aplenty to stroll around, a Chinese Bridge over a lake and the Gothic Tower.

Peckover House’s garden is an oasis of green space and has a warren of different areas to explore. There are sunny lawns for picnicking, shady hideaways perfect for relaxing and reading a good book and a recently restored Victorian orangery boasting 300-year-old fruiting trees.