6. The Villages, US

Volunteers at the Lake Miona Recreation Center watch the one millionth Operation Shoebox box getting packed in the Villages in Florida on Nov 11, 2013. [Photo/IC]

The Villages, dubbed the Disney World for old people, in Florida, is the world's largest retirement complex - home to more than 100,000 old age pensioners.

Made up of a series of mini estates containing row after row of identical bungalows, each has a perfectly manicured lawn. Strict rules stipulate that grandchildren can stay no longer than 30 days a year and there are even rules about which garden ornaments and holiday decorations can be used.