Rail Trails
https://www.railtrails.org.au/ Our taxes have been busily at work creating these lately. There are now some really long ones http://www.murraytomountains.com.au/the-rail-trail/ http://www.greatvictorianrailtrail.com.au/ https://www.railtrails.org.au/trail-descriptions/victoria/gippsland?view=trail&id=143 Some could be combined with an existing hiking trail to make an interesting loop walk, eg the George Bass Coastal Walk and the Bass Coast Rail Trail: http://parkweb.vic.gov.au/__data/assets/pdf_file/0003/352803/Park-note-George-Bass-Coastal-Walk.pdf & https://www.railtrails.org.au/index.php?option=com_railtrails&view=trail&id=203&Itemid=244