dwarf conifers. The original hardscape was constructed by Works Progress Administration in 1935 and persists to this day. The garden was originally known as the Perennial Garden, which was transformed into the Outdoor Garden in 1986. Botany Hall The Botany Hall, across from Panther Hollow Bridge, features a small garden containing walkways, curved benches, and a fountain. The Botany Hall was funded, in 1901, by Henry Phipps to be used by local teachers looking to enhance class trips to the glasshouse. It was renovated in the late 1990s and continues to serve as a site for many educational programs and events. Aquatic Garden The Aquatic garden is located on the east side of the Conservatory outside of the Victoria Room. During the summer, the two pools are filled with tropical water plants and floating flora. One of the pools features a statue of Neptune, the Roman god of the sea, which was presented to Phipps shortly after the conservatory opened in 1893. The northern pool was constructed sometime between 1910 and 1915, and the southern one was added in 1939. Center for Sustainable Landscapes The Center for Sustainable Landscapes (CSL) is a building on the Conservatory grounds, located south of the Tropical Forest Conservatory, that is designed to be environmentally sustainable. Opened in December 2012, the building produces all of its own energy and treats and reuses all water captured on site. The exhibits in the building include informational signs, an interactive kiosk, and art exhibits. The building also contains a classroom for children. The CSL has received a Platinum LEED certification along with fulfilling the Living Building Challenge for net-zero energy, Additionally, the CSL is the first and only building to receive Four Stars Sustainable SITES Initiative certification for landscaping projects. These honors and certifications make the CSL one of the 'greenest' buildings in the world. See also List of botanical gardens and arboretums in Pennsylvania References External links Schenley Park Botanical gardens in Pennsylvania Buildings and structures in Pittsburgh Greenhouses in Pennsylvania City of Pittsburgh historic designations Agricultural buildings and structures on the National Register of Historic Places in Pennsylvania National Register of Historic Places in Pittsburgh Pittsburgh History & Landmarks Foundation Historic Landmarks Buildings and structures completed in 1893 Protected areas established in 1893 1893 establishments in Pennsylvania Leadership in Energy and Environmental Design basic silver certified buildings Parks in Pittsburgh Phipps family Tourist attractions in Pittsburgh