Abstract: The invention disclose a method and formwork for casting concrete or concrete like elements where said elements may have an amorphous shape, wherein the method comprises the following steps: —in a block of formable material having a size larger than the element to be cast, a model of the element is cut out, thereby creating an inner formwork; —an outer load bearing support structure having an inner size corresponding to the outer dimensions of the block is created; —the parts of the block not representing the model are arranged in the interior of the load bearing support structure, thereby creating a cavity corresponding to the model; —optionally reinforcement is arranged in the cavity; fresh concrete or other concrete like material is poured into the cavity and allowed to cure; —the outer load bearing support structure and the inner formwork are removed.