Two tour companies, Pyongyang-Travel and Koryo Tours, have conducted the most extensive tours of the Pyongyang Metro system to date after visiting stations in April that were previously off limits to foreign visitors.

Tourists were previously only allowed to visit a small number of stations on one of Pyongyang's two Metro lines, but members of a Koryo Tours group were able to visit all but one of the stations on the Chollima line on April 18. Pyongyang-Travel, another company specializing in niche interest tours of the DPRK, impressively conducted an even more extensive tour, visiting all but three stations on both the Chŏllima and Hyŏksin lines between April 3 and April 10.