Absolutely. There is a cliff to the south that drops to the sea with a waterfall. There are mountains to the NE and NW. The city guards two passes, one to the east and one to the north. The northern pass leads to the ominously named giant's staircase.

The regional map for this area is here

The defences at the eastern extreme of the city limits are here.

Yep, those walls are pretty run down. Certainly no match for the army that comes marching out of the mountains.