Michael Palin travels the Pacific Rim through 18 countries. In Bolivia, he visits Lake Titicaca, on the roof of the Andes, and meets Meriel Larkin, a formidable Englishwoman who is restoring a 140-year-old steamer. He then follows the 1,000-mile path of the Urubamba River by train, lorry, canoe and river boat before visiting the wondrous Inca ruins of Machu Picchu.