Beta Features/Nearby Pages
See Beta Features/Nearby Pages/Design for ongoing design work. A big overhaul is planned to incorporate maps in the experience. In Zurich a hackathon is planned to try to get maps into Wikipedia. You are most welcomed there to help guide us.
Wiki* projects have a huge amount of geographical data. The (opt in) Nearby Pages allows you to surface related pages to what you are reading based on this information.
TL;DR: Adds a button to the top right corner of pages that contain geographical information. When clicked you will be able to see what other pages are nearby.
This beta feature is currently part of the MobileFrontend extension and is also being trialled in the mobile beta. There are various design challenges to still overcome as well as various bugs and there are many ways this feature could be improved (including much design love). It is hoped that with a bit more work like Special:Nearby this can be a useful and enjoyable part of the reading experience.