backwater
n.a place that is very quiet, isolated, and far away from the main activity or excitement. It is often used to describe a small town or a part of a river that is not busy.
n.a remote, isolated, or unimportant place, often used to describe a small town or a stagnant part of a river. It implies a lack of modern development or commercial activity.
“The small village is a quiet backwater far from the city.”
“The old factory was turned into a community center, transforming the industrial backwater into a vibrant cultural hub.”
“While the coastal metropolis thrives on tourism and trade, the interior remains a forgotten backwater where traditional customs persist despite the passage of time.”
From back + water.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.