were originally called the Mount Coot-tha Botanic Gardens and were officially opened in 1976, becoming the Brisbane Botanic Gardens with the gardens in the CBD being renamed the City Botanic Gardens) .The new gardens cover . The Mount Coot-tha Library opened in 1975 at the Brisbane Botanic Gardens. Unlike most branches of the Brisbane City Libraries, this library specialises in botany, horticulture, gardening and landscape design. On 24 May 1978, Sir Thomas Brisbane Planetarium officially opened in the grounds of the Brisbane Botanic Gardens. Brisbane community television channel 31 Digital broadcast from the mountain from 1994 to 2017, after which it shifted to internet streaming under the new name of Hitchhike TV. On 20 November 2005, one of the Mount Coot-tha more difficult trails, the Currawong trail, was renamed the Kokoda trail in honour of the Australian soldiers who marched the Kokoda Track in Papua New Guinea during World War II. In 2017, it was proposed to build Australia's longest zip-line from the summit of Mount Coot-tha down to the Brisbane Botanic Gardens. Despite initially being approved by the Brisbane City Council, in April 2019 the new Mayor of Brisbane Adrian Schrinner decided to cancel the project due to public protests. Heritage listings Mount Coot-tha has a number of heritage-listed sites, including: Sir Samuel Griffith Drive: Mount Coot-tha Forest Sir Samuel Griffith Drive: Mount Coot-tha Lookout The Lookout Mount Coot-tha is one of Brisbane's most popular tourist destinations and is a popular stop with bus tours. Of particular note is the Lookout, which includes the Kuta Cafe, Summit Restaurant, and Gift Shop. The lookout, restaurant and cafe allow for panoramic views of the City. A function centre adjoins the restaurant. Well-known British astronomer Sir Patrick Moore gave a night-time public lecture about the stars of the southern hemisphere at the lookout in 1988, in conjunction with Patrick Moore being a guest speaker at a dinner of the Southern Astronomical Society at Toowong in Queensland. The Mount Coot-tha Reserve The Mount Coot-tha Reserve contains more than 1,500 hectares of natural bushland, including J C Slaughter Falls along Ithaca Creek, as well as native wildlife. Mount Coot-tha Reserve also shares a border with Brisbane Forest Park, which adds a further 25,000 hectares. Television and radio towers On a ridge near the summit on the other side of Mount Coot-tha, are the television transmission towers for the Brisbane television stations and their respective