Endangered Western Pond Turtles are exhibited at the Oregon Zoo. They have a nice big turtle tank, which houses several turtles. The Zoo is helping the western pond turtles in the wild.
Western pond turtles are a freshwater turtle and grows to 6″-8″ SCL. See the Western Pond Turtle Recovery Project of the Woodland Park Zoo for more information (that links to a different zoo than the one in the video).
This is an older video, but it’s a nice one.