I've always liked the look of these horse troughs for vegi gardens. Photo from Banyon Tree Design Studio.
Raised Gardens do not have to be difficult or expensive. --- "We salvaged these pallets from a local warehouse and cut them into thirds. 2 full pallets were used here. 4′x4′ posts screwed to the corners and voila, a beautifully gridded garden bed full of black gold, just waiting for planting. Grid was stapled old venetian blinds. It was inspired by the Square Foot Garden method."