7 Underground Wonders of The World


Wieliczka, Poland
7 w

Wieliczka sits atop one of the world's oldest salt mines, in continuous operation for over 800 years until just this year. Over 1,000 feet deep, the mine even housed an airplane factory run by the Polish resistance during the 2nd World War.
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Reader's comments(4)
1: Amazing..........
Posted by: chinnu - 04 Jun, 2012
2: Looks Interesting read... will read later.
Posted by: Vaibhav Jain - 04 Jun, 2012
3: Mindboggling. Amazing!
Dr.A.Jagadeesh Nellore(AP),India
Posted by: Anumakonda - 03 Jun, 2012
4: Amazing wonders!
Posted by: Shreekant - 01 Jun, 2012