two kilometers or so down in most places there are these incredibly hot rocks, ’cause the interior of the earth is extremely hot, several million degrees

– Al Gore (Nobel Laureate)

http://newsbusters.org/

Before its closing in 2002 Homestake Gold Mine was the oldest, largest and deepest mine in the Western Hemisphere, reaching more than 8000 feet below the town of Lead.

http://www.homestakevisitorcenter.com/