the tony castro design is estimated to cost 40million euros -lrb- £ 29m / $ 43m -rrb- to build and more to buy .
the british designer has created the yacht to withstand a circumnavigation around the world .
luxurious touches include a cinema , wine cellar , gym , sauna and beach club as well as the infinity pool .
there is also space for submarines , supercars and jetskis on board .