This infographic from GeoCon Site Investigations takes you deep to the centre of the earth revealing some of the greatest holes and disastrous holes known to the human race.
David Wallace
David Wallace is a search & social media marketer who lives in Ahwatukee Arizona with his lovely wife. Interests & hobbies include all things Disney, roller coasters, musicianship and Christianity. Follow +David Wallace on Google + as well as Twitter.
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