Somewhere down there, 80 feet below North Central Expressway, sits a train station that has never seen a train. DART dug out the proposed Knox-Henderson Station in the 1990s, and it would have been a stop on two lines. There’s a tunnel and the shell of a station—but nothing more. It’s somehow both a waste of money and a wasted opportunity. After a few years of construction, with the costs mounting and projections topping $100 million, the project was halted indefinitely.