May 14, 2020
OKM Glossary

Tunnels are artificial underground passages, especially built through a hill or under a building, road or river.

The connecting passages serve, for example, as access to special rooms or as secret escape tunnels. With the discovery of tunnels, a piece of history of building complexes can be reconstructed and treasure troves can be discovered.

May 14, 2020

Cavity Detection

Experience adventure, fascination and history: Cavity Detection with the appropriate detector goes beyond treasure hunting. Discover lost places and hidden ...

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