The Saint Louis Abbey and Saint Louis Priory School arboretum is located on the 150-acre campus located in St. Louis County. More than 100 species of trees are spread across the beautiful campus. Each year, students plant new trees. The campus has several trails for walking or running in the wooded areas of the grounds. The grounds are open to visitors, and an interactive map can be found on the school’s website, www.priory.org, for tree identification. Students will continue to add more trees and images to the map.