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Amsterdam
The UNESCO canal ring is best read from a bicycle or an electric canal boat — both are how locals actually move. Amsterdam's centre is closed to most non-resident cars, the GVB tram network runs on Dutch wind power, and the Jordaan, De Pijp and Oost neighbourhoods are studded with Green Key-certified canal hotels in restored 17th-century merchants' houses. Skip July's stag-do crowds and book late May or early September.
Highlights: UNESCO canal belt · Rijksmuseum & Van Gogh Museum · Vondelpark cycling · NDSM shipyard art quarter