This episode of the travel series Mystery Places jumps between five extreme locations around the globe. Cameras follow guests checking into what locals call the world's most dangerous hotel, then cut to Luoyang, China, where a housing development has been built as a full replica of an Austrian UNESCO village, complete with alpine facades transplanted onto Chinese apartment blocks. The crew tours a sprawling used car market in Benin, where imported vehicles from Europe get a second life, and descends into the Mirny diamond mine in Siberia, one of the deepest open-pit excavations on Earth, its crater so wide it reportedly disrupts helicopter flight paths above it. A stop at a coastal airstrip known for its short runway and ocean approach rounds out the episode's look at engineering built around extreme geography. Narration ties the segments together with basic facts and figures on each site, keeping the pace brisk as it moves from architecture to industry to infrastructure without lingering long on any single stop.