Spa Alpentherme, Central Austria The 36,000 sq m resort, in the spa town of Bad Hofgastein in the Gastein valley, is contemporary and colourful with four “water worlds”: family-friendly, relaxation, sauna and a women-only space. There are steam rooms, cool swimming lakes, a lazy river, thermal pools and, of course, mountain views. Don’t miss the Gastein cure, which uses water from a thermal spring that is rich in naturally occurring radon. Soak in a pool of the healing water (from…