Paul discovers a forgotten German PoW camp from WWI before walking to the Blackwater Dam — built 100 years ago by the last of the navvies. Afterwards, a trek across the moors leads to the UK's highest and remotest railway station. After enjoying luxury in the middle of nowhere at Corrour Lodge, Paul makes a long hike down to Loch Laggan, where he is taken out to an island with a legendary feasting tradition. Further south, he explores the lochs of the northern Trossachs. Here, he learns about mythic water horses and the legend of Rob Roy MacGregor, and meets a man who casts doubt on this legendary character. Paul then travels along a disused railway to the "Shaky Toun" — Scotland's earthquake centre. A trek on horseback takes Paul to Loch Tay, where he goes back to the Iron Age and learns how to light a fire without matches. Journey's end is on the summit of mist-wreathed Ben Lawers.