|amenity = vivarium|
|Laboratory-like facility(s), where animals are kept and studied|
|Used on these elements|
|Status: in use|
|Tools for this tag|
It would appear the tag is used for facilities where animals are kept and studied, whether for medical, educational or similar purposes. As the tag is undocumented, consider if the facility you are tagging fits the description for a vivarium. Could it be tagged differently, e.g. tourism=zoo?