The 'Blue Door' is, without doubt, Stockholm's most romantic café. Next door to prominent art gallery Liljevalchs Konsthall, this beautiful piazza-like garden is a secret hideaway in the heart of the island. The interior isn't that exciting, so you should probably choose somewhere else on a rainy day. There's a medieval-style table inside laden with a mouth-watering display of desserts. If you're visiting Vasamuseet, Skansen or Gröna Lund, then Blå Porten is the perfect stop.