exept northern from there we have the map and no forest there...
like said the fact that they have hint that rak tika is the home of a viera race while they are from golmore jungle is from the get go is strange, is true that they haven't said is not time travel, but they haven't talk of time travel too, but my point is the whole idea of time travel come from one line, when every hint, point to the first shard.... the sole presence of minfilia as envoy of hyadelin (her eyes hint to it) and the fact to say that we need to be a warrior of darkness.... is hint big enough.... if we had the capacity to time travel....
why only go back to stop the 8th calamity?
why not go stop dalmud and the release of bahamut?
why not go back in time for stop every calamity? why not go and stop even the creation of the empire!

time travel is a mess.... without a very solide story you will be filled with paradox.... alexander is a perfect example of this.... the whole story of alexander is a time paradox.... since the two that did go back in time, are born from the clan they have themself create!
any author or scenarist will say you.... that time travel is the most dangerous and complicate setup to use without breaking everything! the theory about time travel.... is bogus....