http://images.wikia.com/ff14/images/..._Dhona_Map.jpg
For some reason, on the big Eorzea map they mark Silvertear Falls but not Silvertear Lake. idk why
There's a few NPCs who mention the Falls so I'm assuming they're just famous (but considering what happened to the Lake--wtf); Silvertear Falls looks like it's just out of our reach, iirc the bottom of the cliff around that area in Mor Dhona is green instead of weird purple.
that said, as a friend said: lol1.0lore&maps
my favourite theory of the 1.0->2.0 jump is the "we're using the Echo and then using the Echo within the Echo" cuz it makes me laugh at the absurdity of it all before i realize i'm pretending to slay giant dodo birds with a gas problem and fucked up living flowers that float and are ugly