Around there; that area — a colloquial expression referring to a nearby place or approximate matters.
そこらへんに車を停めてもいいですか？
Is it okay to park the car around there?
その店は駅のそこらへんにありますよ。
That shop is around the station.
その問題の対応は、そこらへんの人に任せてください。
Leave handling that issue to the people around there.
帰りはそこらへんで待ち合わせましょう。
Let's meet around there on the way back.