There's a nice little side exhibit at Tate Britain on Turner's use of Colour and Line.  It includes this descriptive panel which caught my eye in relation to this project.

Some thoughts:

What was tourism like in the early 19th Century?  How did these travels work?

The story of the journey itself is secondary to the things that get made as a result of the journey.

For those who need to know purpose: "to gather (visual) material to use as an inspiration for ... finished works"