So called Upside down Rail Bridge

The Ideraway Creek bridge is one of the most unusual bridges in Australia. It demonstrates the economic re-use of part of the erection truss used to build the Burdekin River Rail Bridge at Macrossan between Townsville and Charters Towers opened in 1899. The complete truss was 250 feet (76 m) long whereas the Ideraway Creek bridge uses only 150 feet (46 m) of the span. The pinned construction and multiple members of the truss were originally designed for rapid assembly and disassembly.
Ideraway Creek Railway Bridge was listed on the Queensland Heritage Register on 21 October 1992
Info from Wikipedia .Here's a link for those interested.

en.wikipedia.org/wiki/Ideraway_Creek_Railway_Bridge