Why is this European city ranked the No. 1 place in the world for expats?

Considering a move abroad? Or being asked to relocate for work? A new ranking of international cities' quality of life sheds light on which global locales offer the greatest appeal for expats. 

A new Quality of Living City Ranking from global consulting firm Mercer lists more than 240 cities across five continents in order of their quality-of-life ratings. The report took into account living standards, cultural environment, housing, infrastructure, air quality and other features that can make a city either an attractive or uninspiring place to live. 

Zurich, Switzerland, a global financial hub known for its exceptional public services, safety and vibrant cultural scene, took the top spot. Vienna, Austria, placed second, while Geneva, Switzerland, came in third.