For seasoned travellers who’ve ostensibly seen and done it all, the final frontier is – ironically enough – what covers 70% of the Earth’s surface. But if you’re not quite ready to dive headfirst into the James Cameron ocean explorer lifestyle, dip a toe in with the best underwater hotels (and hotel experiences) that money can buy.
With views unlike any other and an overwhelming sense of serenity that surely has something to do with our evolutionary reverence for water, if the…