
Application Name: Wikipedia Places Free
Description: Lists Wikipedia entries near your current location.
Publisher’s website: 2-3
Cost: Free ad supported version; $2 paid version removes ads.
Version/date reviewed: v.1.11 / 4-1-11
Phone/OS: Droid X / Android 2.2
Android Market (mobile app only)
Android Market (browser)

Straightforward app – gets you GPS location, and lists any nearby locations geotagged in Wikipedia. Tap on a list item …

… and go to the mobile browser view of that page; your phone’s Back button will take you back to the app.

Clicking on the “map icon” next to a listing brings you to a map view of that location; you can select any supported and installed app (Google Maps here, but works with Bing, Mapquest, Locus, etc.). It’s accurate, but some kind of more-visible placemark would be useful.
Other issues: Lots of nags to upgrade to the ad-free version, but if you use it enough to be bothered by those, you really should upgrade.
Final thoughts: Other apps show Wikipedia locations as small icons on a map, that can be hard to tap accurately; this list approach definitely has advantages.