Cursor position to world

public Vector3 GetCursorPosition()
    {
        Vector3 mouse = Input.mousePosition;
        Ray castPoint = Camera.main.ScreenPointToRay(mouse);
        RaycastHit hit;
        if (Physics.Raycast(castPoint, out hit, Mathf.Infinity))
        {
            return hit.point;
        }

        return Vector3.zero;
    }