A man was left stunned to find a huge tunnel built under his home - and no one has any idea why it is there. Gary Machens noticed the pavement outside his home in Illinois, US, had begun to slope and as he made attempts to fix it, he discovered it sat above a large, hollow space.
When he looked through a narrow gap underneath some stonework in an arch formation, he saw a huge underground tunnel constructed with brick that he never previously knew existed.
Gary sought expert advice and the hope of an explanation, saying that historians in the Alton area of Illinois believe the tunnel was constructed in about 1840.
During an appearance on Fox 2 St Louis, he said: "[I] had a problem here at the sidewalk and as we were doing some excavating
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