In any country the extraordinarily beautiful crater lake at Paekdusan would be a remarkable site, but in North Korea it's pretty much the most important single place in the country, mythologised thoroughly by both ancient Korean lore and more modern DPRK propaganda. Paekdusan's folkloric claim to fame as the birthplace of the founder of the first Korean dynasty means that its significance is central to the country's national myth, a fact only echoed by the dubious claim that four millennia later Kim Jong-il was also born here.
Paekdusan is not included on most tours, as it involves chartering an internal flight to Samjiyon and then driving 1½ hours into the mountains from there. However, if you have the time and money to include a visit on your trip, you will not be disappointed. It’s also possible to approach Paekdusan from the Chinese side of the border.