Looks like a roller coaster

That's what the clues said. Unfortunately, they also said to count the number of words in the name of the sculpture, but the name plaque had apparently been removed during some recent landscaping. Turns out it's <a href="http://www.plantext.bf.umich.edu/planner/sculpture/north/sumarith.htm">Summaries of Arthmitic Through Dust, Including Writing not yet Printed.</a>Okay. Also turns out we were able to figure out our route without the missing information.