Through the black, a flash of unexpected light. BART's Transbay Tube runs under the San Francisco Bay.

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Connecting Oakland to The City by tunneling through dark, deep brine. Your next time through, peer into the dark. Even at 70 miles per hour you may glimpse the phantom station mid-way through the eight mile submergence. No one's talking about it. Is it an abandoned construction site, peopled by the homeless? A cold war bunker? A cancelled connection to the old Treasure Island Navy base? An exclusive night club with an unbeatable underwater view? A biowar research lab, isolated for the next Andromeda strain? A deep sea diving platform, the better to find jumpers who preferred the Bay Bridge to the Golden Gate? An archaelogical site, continuing a 40 year investigation into an alien wreck uncovered by Bechtel during construction?

The next time a BART train blows through your station without picking up passengers, remember this. It could be on the way to the mystery stop.