･Observe breathtaking views from Euromast, the Netherlands' tallest observation tower. Originally built in 1960 in Rotterdam for an international horticultural exhibition, it was designated a national monument in 2010. From 112 metres high, take in sweeping vistas of the city and its bustling harbour. For an even higher vantage point, ascend to 185 metres on the Euroscoop, a rotating panoramic elevator with a glass floor, and on clear days, try to catch sight of The Hague in the distance.