The Arboretum at Penn State lies on the n.w. section of campus between Shortlidge and Bigler rds. Due to the great size of the project, portions of the 370-acre site are opening in phases. The 35-acre H.O. Smith Botanic Gardens is open, and it features more than 700 species and 17,000 plants, an overlook pavilion, fountain, boardwalk, rose and fragrance garden, lotus pond, esplanade, sub-tropical-themed terrace and pollinators' gardens. The Childhood's Gate Children's Garden is designed for visitors from ages 3 to 12, and includes information about the region's biodiversity. The main biking and hiking trail is the Bellefonte Central Rail Trail, a 1.3-mile crushed-limestone path following the old railroad bed.
Future additions will include additional themed gardens, an education center and a conservatory.