Size: 26x19cm./10×7.4inch.
Weight: 413gr./14.5oz.
Pages: 122
Year: 1999
 
Book made in North Korea, 1999, about the Ryongmun Cavern. Formed hundreds of millions of years ago (as such geological formations tend to be), this vast limestone cave complex consists of both large caverns and smaller side-systems. Many parts are illuminated in garish colours, like a 1980s school disco.
While the larger caverns can be up to 40m in height there are also smaller tunnels to navigate, with staircases bolted and carved into the rock to allow access. It is not particularly strenuous to get through the system, no crawling or climbing is needed, but a steady tread, decent shows, and being able to duck under some sharp stalactites is important. A basic hike down here is 2-3 km, the cave itself extends for 7km.