The source model was created at http://jthatch.com/Terrain2STL/, so you can create your own!
Read how to create puzzles: https://blog.prusaprinters.org/print-your-own-3d-puzzles/
Check the first layer. If the first layer is squeezed too much, the puzzle pieces will stick together.
Live-adjust-Z ;)
Autor oznaczył ten model jako własne oryginalne dzieło.