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Reverse Geocache Puzzle Box

Mikal Hart wanted to give his friend a wedding present like no other – so he engineered a box that can only be opened at a particular location. Here’s the story of the Reverse Geocache Puzzle Box:

Hmm. What does “Distance 391km” mean? “Access Denied” suggests that getting inside the box is indeed the objective of all this button pushing. Just for fun, let’s try again.

Uh oh. We seem to be consuming our limited supply of “attempts”. The “No signal” problem seems to be solved, but the message “Distance 391km” remains puzzling. Does the box know its own location? Is there something 391 kilometers away? London? The Hague? A circle of that radius drawn around Paris intersects quite a few interesting places in France, England, Holland, Switzerland, and Germany.


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