You get this achievement by traveling FROM each monorail station (5 total) in each of the 4 regions (Luxerion has 2; North and South) You can do this as soon as the monorails become available on Day One. It will cost you between 500-1000 Gil total. You can save before hand and reload to get your Gil and time back if you wish. The method I recommend is - As soon as you can, take the North Station Monorail from Luxerion to Yusnaan, then back again. Once back in Luxerion, run to the South Station monorail and take the train to The Wildlands. Once here, turn back around, get back on the Train and take it to The Dead Dunes. As soon as you arrive, turn around, get back on the Train and take it back to Luxerion. The achievement should pop by the time you arrive in the region you started in! If you want, load the before hand save (if you made one) or just continue your journey!