An All-Terrain Vehicle with a frame comprising an arcuate shape. In one embodiment, the arcuate shape with an apex is located between a rear axis and a front axis such that there is additional clearance over a typical non arcuate frame or a flat frame for a given ride height. The frame may also provide for additional structural strength. The frame may also include the ability to attach periphery accessories such as an engine cage, a passenger cage, trailing arms, power train and transmission. In other embodiments the arcuate shape may be on a passenger compartment and the arcuate shape may be integrated with a window.