SCP-000, SCP Database Wiki

Are there any other good hidden SCPs like these two? They were a fun easter egg but now I'm wondering if there are any others I missed the first time I read

What Is SCP-000?

SCP-000, Wiki

Special Projects

SCP-002 - SCP Foundation

SCP-5000 - Why? (…and Dr. Bright) by Tanhony (CC BY-SA 3.0) : r/SCP

Category:Robots, SCP Database Wiki, scp 967

Main - SCP Foundation

Much Ado About Nothing: The SCP Wiki's Most Controversial Article