Under Japanese administration in the 1920s and 1930s bauxite mining was established in the Ngardmau area. The mines were served by a narrow gauge railway. The line of the railway can be followed today, some of the track remains in situ along with a number of other remains such as buildings and one of the original locomotives.
A passenger carrying monorail opened in 2011, roughly following the old track and providing an alternative to walking for visitors to the Ngardmau waterfalls in the Palau Eco Theme Park.
Photo image © farleyfamily.net