|Inhabitants :||All the animals are in the enclosure at least temporarily|
|In the series|
|Appearances :||T-Rex Returns |
A Mammoth Undertaking
Saving the Sabretooth
The observation pen is mainly used to contain creatures that have recently been moved into the park from prehistory. The pen is also used to contain creatures whose enclosure is being moved or modified. The observation pen is often used to separate creatures that are hostile to each other. Notable examples of this are the numerous Tyrannosaurus rex fights. The observation pen is also used as a way to check on creatures with severe or infected wounds or creatures that have recently undergone surgery or any other medical procedure. A notable example is the Woolly Mammoth.
When an adolescent Triceratops which was later named Theo entered the present, he was held in captivity in the observation pen where Suzanne McNabb came to see the park's first arrival until his home called Triceratops Creek was done.
When Martha the Woolly Mammoth entered the park, Suzanne and her assistant operated on an infected wound caused by a spearhead embedded in her shoulder. Sometime after the operation, Martha was able to walk again and she was subsequently moved to Mammoth Mount.