The document lists the top 10 happiest cities in the world according to a survey conducted by Simon Anholt. Rio de Janeiro, Brazil was ranked as the happiest city due to its association with dancing and celebrations like Carnaval. Sydney, Australia and Barcelona, Spain rounded out the top three, with their cultures, climates and iconic landmarks contributing to perceptions of happiness. Overall, cities were considered happy if they were in countries with reputations for fun-loving cultures like Australia, or were centers of arts, culture and nightlife.