A 30-sq-mile jumble of high-walled canyons, the Maze is a rare preserve of true wilderness for hardy backcountry veterans. The colorful canyons are rugged, deep and sometimes completely inaccessible. Many of them look alike and it's easy to get turned around – hence the district's name. (Think topographic maps and GPS.) Rocky roads absolutely necessitate reliable, high-clearance 4WD vehicles. Plan on spending at least three days, though a week is ideal.