On the web portal Planetolog.com you can find world, all cities and countries maps, metro maps and airport locations.

Every information is available at sphereinfo on all about geographical location, history, area, population, maps, flags, capital, languages, ethnicity, religion, literacy, longitude, latitude, adoption agencies, travel, tourist places etc.

Interactive map of Rio de Janeiro with avenues, driving directions, traffic, subway and autobus stations. Opportunity to view satellite and aerial images and to zoom it in and out.