Twenty totally OTT things you can do on a cruise ship

Believe it or not, cruise ships offer some of the world's most luxurious experiences and incredible features for travellers. Where else can you see a Broadway show at sea or sip a cocktail mixed by the world's first robotic bartenders?

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If you like the finer things in life, a cruise holiday offers all the five-star extras you would receive at a hotel, from 24-hour butlers to impressive wine towers with sommeliers, servers and cellar masters on hand to assist with wine pairings.

Spa lovers can indulge in the ultimate in decadent treatments, including a 24-karat gold facial, while one cruise ship even offers an enormous spa suite, which features two bedrooms and an in-room spa retreat (a first at sea) that combines a personal sauna, steam room and treatment area - how's that for spa bliss?

Even the entertainment is amazing: think watching a film at the first IMAX theatre at sea, seeing the stars in a planetarium and having a drink in an ice bar.

And thrill-seekers can have fun-filled adventures with the craziest things you can do on a cruise ship, such as skydiving, surfing, zip lining and whizzing down the world's tallest waterslide at sea.

Discover the most over-the-top things you can do on a cruise ship for a holiday with a difference.