Located at the town of Busselton in Western Australia, Busselton Jetty stretches almost 2 km out to sea making it the longest jetty in the world. A 1.7 km long railway line along the length of the jetty carries tourists to an underwater observatory where some of the 300 different marine species in the area can be sighted from the observatory’s windows. A variety of activities are available at the jetty, including visits to an interpretive center, guided walking tours, sunset train rides, underwater helmet walks, mermaid tours and more.