This guy's work is incredible! Geometric Landscapes - 3D Artist & Motion Designer
Low-Poly, Non-Isometric Worlds by Timothy J. Reynolds
Video Game Graphic Landscapes - Low-Poly Scenery Shows a Geometric Resolution Version of the World (GALLERY)
Geometric illustration Brown Bear Animal by TinyKiwiCreations
Geometric Tiger Made From Triangles - This is how 3-D animations are made in computer, though the triangles are much smaller, and there are lots lots more of them.
How To Create Geometric Low Poly Art The Easy Way
Isometric Low Poly World by Kiril Climson, via Behance