Just minutes from one of Mallorca’s most beautiful beaches, Will Kirby checks into Bikini Island & Mountain Hotel Es Tren for a laidback stay that captures the Mediterranean spirit Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice A chilled-out, adult-only design hotel near