It is the world’s largest indoor beach with 400 sunloungers - and not a cloud in sight. Yet with up to 6,000 visitors allowed in at a time, there are bound to be towel-fights over them – especially as this 'indoors paradise' is in Germany. The Tropical Island Resort in Krausnick, south of Berlin also boasts the largest indoor pool, 50,000-plant forest - and enough space to fly a hot air balloon inside. The former aircraft hangar has been transformed into a paradise offering tourists a tropical escape, if you can ignore the fact that you are miles from any ocean - or the tropics, for that matter.