Paris
Words that come to mind when you think of Paris in May are flourishing and buzzing: the entire city is a hyperactive hive of visitors, lush blooms, and excitement. Tourism is at its hilt and even blase natives start to really see the city again, perhaps inspired by the infectious enthusiasm of visitors. If you're looking for a taste of the Paris you've seen portrayed in technicolor musicals, then visiting in May is for you.
May is a great time to enjoy the city's many beautiful parks and gardens, read or discuss life's meanderings on a cafe terrace, or do some relaxed, entirely uncommitted window shopping in Paris' best shopping areas.
Paris Convention and Visitor Office : http://en.parisinfo.com/