Galvanized water troughs can be used as raised planters. The big containers look great, offer plenty of planting space, and will last for years. You can find the troughs, which are also called livestock tanks, at feed stores. The tanks aren't cheap--they typically run between $115 and $175 depending on the size.
DIY Water Trough Planter — The Gardener | Apartment Therapy http://bit.ly/1GwMpmj