SIU creates virtual tree tours as it seeks to continue Tree Campus tradition Tactical Navigation Raymond A. Bieri III, a master’s student in forestry, human dimensions, is one of the guides for SIU’s new Virtual Tree Tours, a free online overview of the beautiful tree-filled campus. SIU is seeking recognition for the sixth consecutive year as a Tree Campus Higher Education from the Arbor Day Foundation. Photos from video by Todd Duermyer December 10, 2020 by Christi Mathis CARBONDALE, Ill. — Even if you’re miles away from the beautiful campus, you can now check out Southern Illinois University Carbondale’s eclectic variety of trees and learn more about them, courtesy of a free, new Virtual Tree Tour and a 360 Degree Virtual Tree Tour.