Capitals on Borders

I used to think, as you seem to, that Asunción almost–but not quite–touches the Argentinian border. In my case this misapprehension was based mostly on the highlighting that you get if you type the city name into Google Maps, which shows the city limit ending at the edge of the Paraguay River, and the international border running down the middle of said river, a few hundred feet away.

However I've come around to the idea that this highlighting is incorrect. If, for example, you look at the city in OpenStreetMap, you'll see the border of the Distrito Federal extending into the river to meet the international border for a stretch of ~1 mile in the far south of the city.

While OpenStreetMap could of course just as easily be wrong, it is on the other hand consistent with the maps on the Asunción government website, which lends it some non-trivial credibility.

So I'd argue they touch...