Cremation has many internment options.

A columbarium is a structure designed especially for cremation urns. Columbaria are traditionally located on cemetery property, and some but not all cemeteries have columbaria. 

Wall niche burial can be large or small, private or public, a columbarium comprises a few or many cremation niches.

 A stately niche wall for ashes may hold several hundred upon thousands of urns, like the historically significant columbaria located throughout California.

 A cemetery niche wall may hold just one or two urns, or it may hold the urns of many family members.