What is a primary feature that distinguishes urban cemeteries?

A primary feature that distinguishes urban cemeteries is the presence of rows of headstones. This characteristic is particularly emblematic of urban cemeteries, where space is often at a premium and burial practices may prioritize convenience and organization. These rows indicate both a structured approach to burial and a systematic use of available land, reflecting the urban environment's characteristics.

In contrast, urban cemeteries may still feature large open parks, but this is not a defining trait, as many cemeteries irrespective of their location may include green spaces. Proximity to churches can indicate historical ties in some cases, but it’s not a universal feature across all urban cemeteries. Lastly, homemade grave markers generally suggest a more rural or less formal burial practice, which does not capture the essence of the urban cemetery experience. The rows of headstones represent a clear visual and organizational hallmark of how burial sites are arranged in these densely populated areas.