Erin Hogan, art historian and Director of Public Affairs at the Art Institute of Chicago, introduces her new book Spiral Jetta: A Road Trip through the Land Art of the American West. Driving her Volkswagen Jetta solo, Hogan visited and comments on Robert Smithson's Spiral Jetty by the Great Salt Lake, Michael Heizer's Double Negative in Nevada, and Walter De Maria's Lightning Field in New Mexico. This podcast is brought to you by the Ancient Art Podcast. Explore more at ancientartpodcast.org.