I’ve mentioned underwater hotels on A Luxury Travel Blog before, but I think – until now – Jules Undersea Lodge has escaped the radar. It’s an underwater research base which has opened itself to the public. Featured in ‘Lifestyles of the Rich & Famous’, a stay here will set you back $475 per person per night, including gourmet dinner and breakfast. What’s rather unique about the property is that you have to scuba dive to get there!