What if Earth Were a Cube?

"A hypothetical cube world, however, would feature six square faces and you'd only encounter up/down gravity toward the centers of these regions. As you traveled closer and closer to the edge, it would feel like you were walking up an incline and it would be difficult to stand up straight because the gravitational pull would draw you toward the center of the massive cube, which wouldn't lie directly beneath your feet."

http://news.discovery.com/space/what-if-earth-was-a-cube-110815.html