Right now, all around Europe, the high-end hotel scene is preparing to outdo itself. In what is promising to become a bar-raising summer, the Continent’s new openings are getting their final polish. While the best European hotels, from the Mediterranean to the Baltic, have always traded in splendour, the new spring and summer openings take wish fulfillment further, in new niche directions. From converted castles and ultra-prime city stays to high-performance retreats, they might just exceed the elite traveller’s luxury appetite.