Open
https://maps.google.com/ or
http://maps.yandex.ru/ and click "on show my location". Make sure that geo tracking is enabled in your browser (e.g. in FireFox:
about:config ->
geo.enabled and
geo.wifi.uri). So if you are on wifi, you'll see your exact location on those maps even if your PC has no GPS module.
Google Chrome and other browsers do the same. Furthermore, geo tracking is always enabled by default.