a heaven of peace and happiness 世外桃源

“世外桃源”，汉语成语，原指与现实社会隔绝、生活安乐的理想境界，表示“a place that is extremely beautiful and where everything seems perfect, especially a place far away from modern life”。后也指环境幽静生活安逸的地方，可以翻译为a heaven of peace and happiness，a retreat away from the turmoil of the world 或 a remote or imaginary utopia。

例句：

这花园依山傍水，四面苍松翠柏， 绿树成荫， 仿佛是世外桃源。

Fronting water and with a hill at the back, this garden had a dense growth of evergreen trees and formed a “retreat away from the world”.

在开罗不断扩张的都市版图内，这些被悉心照料的花园成了一片世外桃源。

The immaculately tended gardens are an oasis in the midst of Cairo's urban sprawl.