“Welcome to the Sax-Zim Bog,” said our guide, Steve Weston. “Tonight we’ll be going through the towns of Sax and Zim, population nothing.” Moments later we drove by a snow-dusted, abandoned trailer, the front door hanging off one hinge. This was downtown Sax. Zim, a few miles to the north, wasn’t much more. Both are remnants of failed attempts to farm the bog that date back to the early 20th century. Now they are ghost towns surrounded by 200 square miles of wetlands.