Don’t just buy the keyring, visiting Paris without taking a trip to the top of the Eiffel Tower is unthinkable. Built for the 1889 World Fair and centenary of the French Revolution, the 300-metre (985 feet) tower is a radical feat of engineering. At its top, your line of vision may stretch for over 65km (40 miles) on a good day. To elevate your style, visit the Jules Verne restaurant run by Alain Ducasse, whose scallops are legendary. If the weather is warm, take a baguette, pâté and a bottle of red wine to the grassy area beneath the tower for an impromptu picnic. This is best done in the evening, when the tower is illuminated for five minutes every hour by 20,000 light bulbs.