Is there somewhere a map which indicates which areas and cities become sea?
Calculated Earth is one of the better tools for this, you can either zoom in and get various flood stages or set a specific flood stage and see what would flood, it is in metric though so you may need some conversion software to deal with the units for you, depending how familiar you are with metric.
The latest estimations of global land ice mass suggest they have enough water to rise sea level in 66.5 m.
With this value you can go on and produce a global map (or one of you area of interest) at Calculated Earth as @Ash suggested. I agree is a good tool.
I've created an animated GIF using two maps produced at Calculated Earth with current sea level and +66.5m, so you can easily see the changes:
The National Geographic maps (suggested by @Gimelist) are very nice too, and are based in a slightly different figure of 65.8 m (216 ft).
Note that this is just a thought experiment, because the melting of all land ice would have to be encompassed by a significant increase in temperature. Such increase in temperature would also produce a very important sea level rise due to thermal expansion. The magnitude of that rise depends on the temperature rise and the time scale, as the oceans take in the order of millennia to equilibrarte with changes in atmospheric conditions.