<p>Jesse Welter pulls back a chain-link fence on Park Avenue near downtown Detroit with one piece of advice: Look like you belong here.</p><p>Five adults duck through the opening, camera bags under their arms, and flatten themselves on the snowy ground on this Jan. 3 to enter an abandoned building through a 2-foot-high gap.</p><p>Welter, 42, of Royal Oak hosts urban exploring tours for photographers. He has been doing so since 2011, charging $50-$70 per tour. As a photographer himself, he's able to provide advice on composition and exposure. As a veteran explorer, he's able to give safety advice to anyone who RSVP's to his Motor City Photography Workshops on Meetup.com. The Park Avenue Building is one of many he has shown on tours.</p><p>John Gallagher:You tear down the blight in Detroit, but then what?</p><p><a href="http://www.freep.com/article/20140126/NEWS01/301260077/urban-ruin-tours-Detroit">Keep reading...</a></p>