Is there a website which highlights airport locations on a map? Is there a good website which shows airports (both public and GA)? I can look it on Google and Bing Maps (as shown in the image below). Shown the picture, I have zoomed in a lot to see airport icons (bottom left and top right). I feel that the icon on Bing (right) can be easily spotted than the one on Google (left). Even if I zoom out one level, Bing still shows both airports but Google doesn't.

When I search on Internet, mostly A/F Directories are returned. Wikipedia also has a thorough list but I don't like plotting them on a map to find their proximity.
SkyVector is a great resource for aviation maps and data of all kinds. It offers worldwide sectional- and low-ifr-type charts, and a fully-featured Airports section.

I'm not sure if you also want airport diagrams, but you may also get some decent results with OpenStreetMap. The open source maps have some hit-or-miss levels of detail for airports, some including full taxiway and runway data. Others are just property outlines.