Brisbane is the state capital of Queensland. Brisbane is the third most populous city in Australia and the most populous city of Queensland. It is situated on the Brisbane River on a low-lying floodplain between Moreton Bay and the Great Dividing Range in south- eastern Queensland. Popular recreation areas in Brisbane include the South Bank Parklands, Roma Street Parkland, and City Botanic Gardens. The suburb of Mount Coot-tha is home to a popular state forest, and the Brisbane Botanic Gardens which houses the Sir Thomas Brisbane Planetarium and the "Tsuki-yama-chisen" Japanese Garden, formerly of the Japanese Government Pavilion of Brisbane's World Expo '88. Brisbane has over 27 km (16.8 mi) of bicycle pathways, mostly surrounding the Brisbane river and city centre, extending to the west of the city. Lone Pine Koala Sanctuary and Brisbane Forest Park, located in the city, are popular tourist destinations alongside the Story Bridge adventure climb and Portside Wharf.