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Wiktionary
hell gate

n. The entrance to hell, seen as an embodiment of evil. (from 9th c.)

Wikipedia
Hell Gate

Hell Gate is a narrow tidal strait in the East River in New York City in the US. It separates Astoria, Queens from Randall's and Wards Islands (formerly two separate islands, now joined by landfill).

Usage examples of "hell gate".

Any other time, you'd already be swimming in Hell Gate in four different GLAD bags.