Here's a nifty mashup using Google Maps. It computes a skyline terrain panorama from a given location.
The computed skyline isn't bad, although a bit optimistic (I'm pretty sure you can't see the Olympics from downtown Vancouver!). I think this particular query is ignoring earth curvature (although apparently you can choose to take it into account.)
The site uses it's own SRTM dataset. The gazetteer is impressive - not sure how they get that information.
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