"The city of kind hearts" is a unique phrase that captures a sense of community and compassion. There are several synonyms that could be used to describe a place with similar qualities. For example, "The town of open arms" conveys a welcoming and accepting atmosphere. "The village of empathetic souls" suggests a close-knit community that values understanding and support for one another. "The metropolis of charity" emphasizes a city that prioritizes generosity and giving back. All of these phrases evoke a sense of warmth and camaraderie, characteristics that are essential for creating a harmonious and caring society.