Jack's Wee Wee Bush is a bush that Jack urinated into during his GeoGuessr In Real Life video at around 9:50 into the video (He did not show the urination on camera). In the video, Jack tells people that live near the bush to take a photo of themselves with it, which many people have done. It has gone down as a meme where people hold it up to be a place of great historical significance where in reality it is not really.
The Wee Wee Bush was also added onto Google Maps as a location, listed as Wee Wee Bush. The bush is located in a small village called Egleton, in the county of Rutland, in the English Midlands.
Urinating in public is technically illegal in the UK, but those laws are not generally enforced.