i cant find eldbeak peninsula or a mountain with a cavern and lake where are they?

i'll try to keep this spoiler free...

Eldbeak Peninsula is on the Trabia continent north of Balamb, extending south from the western half of the continent. Minde Isle (you'll see) is a featureless, mid-sized island south of the Esthar region.

The mountain with lake and cavern is northwest of Timber. You need the Ragnarok to find the stone. Look for a river that stops at a small waterfall in the plateau near some railroads.

thanx! i thought maybe it was the mountains by balamb because of the fire cavern but i couldnt think what the lake was.