Hobby tunneling
Hobby tunneling is tunnel construction as a pastime. Usually, hobby tunnelers dig their tunnels by hand, using little equipment, and some can spend years or even decades to achieve any degree of completion.
Hobby tunneling is tunnel construction as a pastime. Usually, hobby tunnelers dig their tunnels by hand, using little equipment, and some can spend years or even decades to achieve any degree of completion.
Hobby tunneling is tunnel construction as a pastime. Usually, hobby tunnelers dig their tunnels by hand, using little equipment, and some can spend years or even decades to achieve any degree of completion.
Source: Wikipedia "Hobby tunneling" · CC BY-SA 4.0
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