Back garden tripoint

Apparently there are people who collect such things. Or at least the international versions, where three countries meet. There are currently no true international quadripoints, where four countries meet at a single point, although there are a number of geographical quadripoints involving a mixture of international and internal boundaries, as well as some completely internal ones, such as the famous Four Corners point in the United States where the states of Colorado, New Mexico, Arizona and Utah all meet and where you can be in four states at once.
There are plenty of international tripoints though, for people to photograph and share on the internet.
This is not one of those.