This is the site of one of many rope swings that can be found around the sprawling Temple Newsam grounds. I've always wondered who puts these up, and how? My kids have swung here, and I might have had a go once or twice.
You're looking for a small test tube hidden at the posted co-ordinates. Placed with the kind permission of the Temple Newsam Estate. Good luck.
Although not shown on all maps, the path that runs to the right of the fence will take you towards #3.
Congratluations to IzabelaD86, dj_chr15 and Olivia13B on their family FTF.