The Raptor Pen, also known as the Raptor Pit, or Holding Pen, was a huge reinforced cage on Isla Nublar where the park's Velociraptors were held under maximum security. The Velociraptors originally had a Paddock on the island like any other animal, however their amazing jumping abilities caused a problem as they were constantly escaping their paddock. While their paddock was under construction, this was their temporary paddock as it was too small.