Long time I have not spoken about impossible puzzles. Well they are not that common....!
But see below a nice one that I discovered recently made by Ivan Kochkin
It's composed of several dodecahedrons "trapped" in one another, all in metal and assumely made in only one block of metal.
Usually impossible puzzle/items are made with a trick like an invisible cut or using heat/water to soften the material for example. But in this case (despite not knowing precisely how it was made), no tricks are involved, just a lot of skills!!!
Honestly how is that possible to craft with such precision so many geometrical shapes??....Very intriguing and very pleasant to play with it.
Definitely a work of art and a nice addition to a puzzle collection :)
You can find them: ebay
Ivan has also a youtube channel