In season two, episode six of Gotham Writers' Inside Writing, host Josh Sippie conducts a panel discussion with Panorama Editor-in-Chief Amy Gigi Alexander and writer Cullen Thomas. They discuss how to pry the universality from a travel piece, the difference between commercial and literary, and what a good pitch looks like.  

Links mentioned in the show:  

Panorama: http://www.panoramajournal.org/ 

https://www.theguardian.com/commentisfree/2011/aug/28/travel-writing-hugh-grant-booksellers 

https://matadornetwork.com/notebook/what-ad-execs-should-know-about-travel-writing/