Stockholm
A capital built across 14 islands and connected by 57 bridges — Gamla Stan (the medieval old town), Södermalm (the design quarter), Östermalm (the embassies and the Royal Library) and Djurgården (the museum island with Skansen, Vasa and ABBA). The metro is fossil-free, the commuter ferries are diesel-electric hybrids, and most central hotels run Nordic Swan certification. The archipelago of 30,000 islands begins a 20-minute boat ride east of the centre.
Highlights: Gamla Stan old town · Vasa Museum & Djurgården · Stockholm archipelago day-trip · Fotografiska photography museum