The Busselton Jetty is 1.841km long. It is the longest timber piled jetty in the southern hemisphere and is operated by a non-profit community organisation known as Busselton Jetty Inc.  The jetty’s construction commenced in 1864 and the first section was opened in 1865.  The jetty was extended numerous times until the 1960s, ultimately reaching a length of 1,841 metres (6,040 ft). The last commercial vessel called at the jetty in 1971 and the jetty was closed the following year. It passed into the control of Busselton Shire and has been gradually restored and improved since. The jetty has survived Cyclone Alby in 1978, borers, weathering, several fires, and the threat of demolition, to have become a major regional tourist attraction.  The jetty features a rail line along its length, a relic of the railway line into Busselton from Bunbury. The line now carries tourists along the jetty to an underwater observatory, one of only six natural aquariums in the world, which opened to the public in 2003.