oasis

noun3

1. •
   A spring of fresh water, surrounded by a fertile region of vegetation, in a desert.

   • It was now a beautiful, moonlit night. The air was crisp and invigorating. Behind them lay the interminable vista of the desert, dotted here and there with an occasional oasis. — 1913
2. •
   (figurative) A quiet, peaceful place or situation separated from surrounding noise or bustle.

   • The park was an oasis in the middle of the busy city.
3. •
   (figurative) A place or situation of fruitfulness or abundance separated from surrounding barrenness or scarcity.