Bucket athena-examples

Hello guys,

I have a table setting in Glue, the location of this bucket is athena-examples-us-east-2, like the image below.

When I click on this bucket, I can view all objects on. However, when I look for this bucket on dashboard or CLI, he doesn't exist.

Curiously, I tried to open this bucket in another account, through the browser url, and I achieved! What is this bucket, it's like a sample public bucket?

I noticed that there are another buckets like this, example: athena-examples-us-east-1, athena-examples-us-west-1, etc.