oasis -
A quiet, peaceful place or situation separated from surrounding noise or bustle.
Wikipedia
An oasis or cienega is an isolated area of vegetation in a desert, typically surrounding a spring or similar water source. Oases also provide habitat for animals and even humans if the area is big enough. The location of oases has been of critical importance for trade and transportation routes in desert areas.
OmegaWiki Dictionary
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oasis A spot in a desert where water comes up from an underground spring and trees grow.