There are actually only 369 games, and they will loop around on 2025-08-06 to #1 unless the list expands (which will also increase the number of suggested cities in the search box). The list of all games including names, coordinates and landmark descriptions is transferred every time someone loads the page (if you don’t close the tab and change to another game, it will be cached).

I’m amazed that the direction and distance calculation actually uses spatial trigonometry to account for globe curvature, and does not use special libraries!