Wikipedia: List of Airports in North Korea
- List from the online encyclopedia.
- http://en.wikipedia.org/wiki/List_of_airports_in_North_Korea

Wikipedia: Sunan International Airport
- Article from the online encyclopedia Wikipedia on the airport serving Pyongyang.
- http://en.wikipedia.org/wiki/Sunan_International_Airport

The Pyongyang Metro
- Unofficial site has extensive information about the subway system in the North Korean capital. Includes maps, photos of stations and train equipment, the text of a 1994 official Metro guidebook, tram system information, related Web links, and MP3 audio fi
- http://www.pyongyang-metro.com/