A Huhta Post-Doctoral Fellow at the Center for Historic Preservation at Middle Tennessee State University, Susan Knowles will speak at the Frist Center about how cultural landscapes reflect geographical ones — and vice versa — in the photography exhibit Edward Burtynsky: The Industrial Sublime. Her lecture title, “Inventing Wilderness: Public History, Historical Geography and the Cultural Landscape,” sounds like Burtynsky 101. While that might not entice fans who’ve already seen the show, it sounds like a great chance for newbies to discover the powerfully ambivalent photographs of industrial spaces that are as massive and gorgeous as they are disturbing. The Burtynsky show has been a surprise treat this summer, and I like it better each time I see it. Good exhibits — like films, books and records — reward repeated exposures. If you’re planning to take a second look at an exhibit, why not let a scholar show you around?