Luxury for The adults, water slides for the DC- possible??

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Help!
I want to go somewhere nice in Europe next Summer (ideally Spain or Greece).
We have been spoilt by where we have stayed previously.
The DC have asked for somewhere with water slides (not necessarily a full water park).
Any recommendations please before I go mad looking a travel websites and the dreaded trip advisor!!

Would you consider a cruise? Norwegian epic have private 2 bed suites on the top 2 decks of the ship. You have your own private restaurant/pool/sun decks/spa, but the children can go downstairs to use the water slides and climbing wall etc. We had our own butler and concierge and it was fab.

Thanks Turnoff hadn't considered one but will have a look.

There are plenty of more up-market AI hotels with decent water parks but you'll probably find most of the better ones are in Turkey.
Try looking at Lykia near OluDeniz here

Sensatori hotels in either crete or turkey (side or Fethiye)