The sewers discharge out at sea.

下水道的污水排入海里。

《新英汉大辞典》

On the day of the sixth of June, a battue of the sewers had been ordered.

在六月六日的白天，上级命令搜索阴渠。

youdao

Police in Naples, Italy, Thursday foiled bank robbery plot that the gangs planned to fled away through the sewers.

意大利那不勒斯警方17日破获一起银行抢劫案。犯罪团伙成员计划抢劫成功后经下水道逃跑。

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They want out of Greece, whose police raid them, forcing them into the sewers and culverts.

BBC: Greece asylum: Journey through a broken system

The rats are always down there in the sewers, you can't really get rid of them.

WSJ: Mexico's Drug Cartels May Have Become Too Powerful to Control

Batman would find Killer Croc and chase him into the sewers, where Croc escapes.

FORBES: How Warner Bros. Could Reboot Batman - Part 2