This just came to me while I was sitting here and I wondered if we have anything close to it.
I see it on tele and it was from Britain.
They have a heap of man made tunnels that intersect each other and they go a good distance. The have openings right the way through them and and in an end they have a largish space where they place a rat in a box placed there so the Jacks can scent it out.
It was so interesting to see this happen and some found the rat while others came out at the wrong exits.
But it was interesting.