Bernard Isaac, who lived beneath Riverside Park for 11 years, lights a cigarette while waiting for water to boil in the kitchen he built 30 yard from the tracks. In the background is a mural painted by a graffiti artist copying a classic work of Goya that depicts an execution. One of the last of the Amtrak Tunnel residents, Isaac moved into an apartment in Harlem last June when the railroad forced him out. "I miss the tunnel," he says. "Now I have sirens, cars sounds. I really wanted to stay behind after they got everyone out, just to have some peace."