What is the collective noun for ruins?

There isn't a single, widely accepted collective noun for ruins. However, here are some options you could use, depending on the context:

General:

* A field of ruins

* A collection of ruins

* A scattering of ruins

* A mass of ruins

More evocative:

* A city of ruins (for a large, abandoned city)

* A graveyard of ruins (for a place of many ruined structures)

* A tapestry of ruins (for a diverse collection of ruined buildings)

* A silent testament of ruins (to emphasize the historical significance)

Ultimately, the best choice will depend on the specific context and the desired effect.