The world's 5 most wondrous holes! Kimberley big hole - the largest man made hole in history! 1077 meters deep, yielded 6 tons of diamonds. Glory hole - monticello dam drain california - able to 'swallow' 407, 763 cubic meters of water a year! Blue Hole - Belize - the world's most impressive blue hole, 60 miles from shore. Guatemala sinkhole - sunk many homes and 24 lives!