Deepest underground structures in the world - photo

Deepest underground structures in the world.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...structures.jpg


Previously:

https://www.homemadetools.net/forum/...372#post181457
https://www.homemadetools.net/forum/...825#post186728
https://www.homemadetools.net/forum/...408#post177447
https://www.homemadetools.net/forum/...900#post133596
https://www.homemadetools.net/forum/...630#post162973

The only thing missing it the worlds deepest debt. I'm sure the U.S would win that one.

Isn't there deeper bore holes for oil or gas exploration now?

I also think there is a deeper pool in Dubai. Some of these things do change with time.