Arboretum of the Barnes Foundation

Since 2018 the adjacent Saint Joseph's University has managed the arboretum and its educational programs under a lease agreement with the foundation.

Over time, the arboretum has expanded its collection to over 3,000 species/varieties of woody plants, a herbarium housing 10,000 specimens, and a library of some 2,500 volumes.

The arboretum contains good collections of Aesculus, Cotoneaster, Cornus, crab apples, ornamental ferns, lilac, Lonicera, Magnolia, peony, Quercus, Phellodendron, Rhododendron, Stewartia, and Viburnum, as well as notable specimens of Ginkgo biloba, Calocedrus decurrens, Cunninghamia lanceolata, Sequoia sempervirens, and Trochodendron aralioides.

Other plants of interest include Araucaria araucana, Davidia involucrata, and Parrotia persica.

It also contains a formal rose and perennial garden, woodland, lawns, pond, stream, and a greenhouse (reconstructed in 2002) containing about 250 varieties of plants.