Numbeo is the world’s largest database of user contributed data about cities and countries worldwide. Numbeo provides current and timely information on world living conditions including cost of living, housing indicators, health care, traffic, crime, pollution and net Salary.

You can change the currency at the top of the page after your selection.

Choose a city and compare:
https://www.numbeo.com/cost-of-living/gmaps.jsp

 

Very cool. Not related, but seeing this post reminded me of another cool, yet kind of disturbing app that's somewhat connected: The World Population Project. You can even calculate how long you will live according to statistics, which is the creepy part lol

http://www.population.io/