SCP-115 - Miniature Dump Truck
SCP-115-1 was originally found in a construction site… where workers attempted to move it, but found the task impossible due to the fact that SCP-115-1 weighs 90 tons.
SCP-007 - Abdominal Planet
When questioned about planet's origins, Subject replied, “I just woke up one day, and there it was. I don't have any idea how it got there.”