4. The Shark Fin

If The SeaOrbiter (left) were to be adapted for cruise purposes, underwater dining would be a must. - Photo by Jacques Rougerie

There’s always something to be said for great views from a balcony, but how amazing would it be to look out your porthole and see a coral reef or a school of fish? What makes this design unlikely is that destination ports would have to be completely redesigned to accommodate a ship that extends this far underwater. At the moment, designer Jacques Rougerie intends for “The SeaOrbiter” to be a research lab, but we cruisers will be keeping our fingers crossed for a commercial version.