As someone else said, there are some difficult ones that require climbing gear (which reminds me of playing various MMOs) - one in my town is about 15m up a large tree!

Not sure this comment deserves downvoting. As a teacher (UK) I get 13 weeks off a year, which is pretty much all time off (no expectation to prep/mark). Private sector friends tend to get around 4-5 weeks max. Similarly, the pension is far better than private sector pensions.

Whilst I might be able to change career for more money, I’m not sure it would be a net benefit, even for 50% more.

That said, the “work time” as a teacher is fairly full on, at around 55-60 hours a week for me, so that’s some form of trade-off. You do have to like doing it!

Someone hides a camouflaged container in a slightly interesting place (e.g. behind a statue, near an old church, some place with a nice view) and registers the GPS location, usually on an app. In the container they’ll put a small (sometimes tiny) notebook and sometimes a little trinket of some sort. They may also put a couple of text hints on the app as to the container’s exact location.

You then use the app to navigate to the GPS location and search for the container. Put your name/nickname in the notebook, take/swap/leave a trinket, and re hide the container.

We do it most often when we’re on holiday with our kids (both under 10), it’s usually a nice way to explore the area you’re in, since the locations have generally been chosen by someone with a good knowledge of the local area. There’s only been 1 so far we’ve been unable to get, and that’s because it’s 15m up a big tree and we don’t have any climbing gear!