I spent a week on mega-ship Icon of the Seas and tried to experience EVERYTHING it offers, from a zip-line over the edge of the ship to a peek inside the £116k-a-week townhouse cabin (with its own SLIDE)

I spend a week on the biggest cruise ship in the world, Royal Caribbean’s Icon of the Seas – and this is what it’s like.As I board, I set myself a challenge: to try to experience everything Icon of the Seas has to offer. I have a week – is it...