When you are lost in an unknown place, you can ask the police for directions.

我有地址。我们可以在这里下车，然后再问路。

youdao

In the bleak light of dawn she was preparing to leave her hometown for an unknown place.

在黎明惨淡的光线中，她准备离开故乡，去一个陌生的地方。

youdao

He was afraid that he might die in this unknown place and his family would not even find his corpse.

他害怕他会死在这个不知名的地方﹐甚至于他的家人也无法找到他的尸体了。

youdao

An inquest takes place when someone has died under suspicious or unknown conditions.

VOA: special.2009.08.31

Roth can evoke an unknown place and time with an exactness of sensory detail that is particularly alive to sounds and to changing light.

ECONOMIST: Modern fiction

Now, we've already given our opinions on using GPS technology like this and, while it's unknown whether these agents had a warrant to place this device, the 9th US Court of Appeals recently made one unnecessary for this sort of thing.

ENGADGET: American student finds GPS tracker stuck to car, FBI shows up to reclaim its 'federal property'

As governments and companies place their bets, perhaps the biggest unknown is which technologies will win.

WSJ: Green Technologies Begin to Play Key Role in Global Economic Fight