ohio borders pennsylvania, michigan, indiana, kentucky, and west virginia, and it shares a water border with ontario, canada. western ohio is mostly flat farmland, with some hills. southern and southeastern ohio is near the appalachian mountains, and is the most mountainous part of the state. most of this area is covered by forests. this part of ohio is home to the ohio river, the wayne national forest, and the hocking hills, which has waterfalls and canyons.