There’s an interesting initiative on Polish Facebook. People paint stones, add their postal code and leave the stone somewhere. Then someone finds the stone, posts on Facebook with a dedicated hashtag and takes it somewhere else.
Yesterday I found one of those stones. The caption "kaminky" tells me its origins are in Czechia and the zip code reveals the city or the county of Trinec. I will take it on my next hiking trip. Looking forward to seeing how far it will travel.
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