The city of Irwindale, Calif., is known for gigantic holes, left where gravel was mined, but the city wants more room for houses. It would cost an estimated $23 million to fill just one of the gaping cavities, so the city's redevelopment agency is considering using tax money to build houses inside a 74-acre abandoned gravel pit. Some of the 175 houses will be as much as 80 feet below surrounding terrain. “Hopefully, it will have the same feeling as if it's on a hillside looking down into a valley,” says city manager Joe Guzzeta. (AP) ...More likely: voters will realize they've been given the shaft.