Wonders of the world

They've had enough of the orphanage. Borealis and Australis are twins. Orphan twins. Their parents promised them they'd be back when they could afford it. It's been 6 years. Borealis and Australis are now turning 16 and will be thrown out the orphanage labeled as "useless humans" they decide to look for their mother and father. They have no idea if they are dead of alive, do they abandon hope or continue on a life threatening possibly pointless track to their parents? Who knows if they even make it as two?