@Chase, because the Salween River in Myanmar crossed more than one country, and we know the river we're looking for don't, can't you give @Julie Justice's question a pass? Could use an extra answer point.
fun facts: Quokkas naturally look like they’re smiling because of the shape of their mouths. The internet adopted them as “the happiest animal,” though in reality they’re just little nocturnal marshmallow creatures trying to survive like everything else.
Edited because the answer was wrong and needs rewording: I am one of the great world cities that sits near major fault lines. Cats roam my ancient ruins. Empires fought endlessly over me because I connected continents. Where am I?”