Although it appears to be a roller coaster in an amusement park, the winding structure in the foreground is actually a boardwalk in a man-made wetland and nature preserve within Clinton Presidential Park in downtown Little Rock, Arkansas. The nature preserve, at least at the time of my visit four years ago, was thriving with vegetation and wildlife. Like the park itself, the wetland had previously been a run-down warehouse district. The downtown skyline can be seen in the background.