I agree with the one star rating.

Rating: 1/10 (9 January 2018)

What a dreadful movie. As one reviewer below states.....no sense of a time frame for the journeys, somehow floating down stream to discover the source, raft crew who just appear, without any context, quick view of a steam train in 'Bolivia', which is so obviously a British one - running through the Scottish landscape if I'm not mistaken. Terrible editing and story line....what else can we say except I wasted $5 renting the DVD. Keep up the good work IMDb.