Walkable Roller Coaster

"Named Tiger & Turtle, Magic Mountain and located in Duisburg, Germany, it was designed to give visitors a thrill-ride inspired view of the surrounding German countryside. Designed by sculptors, Ulrich Genth and Heike Mutter, the public art piece took eight weeks to assemble and was named the Tiger & Turtle, Magic Mountain because the roller coaster represents the speed of a tiger, but the curious have to investigate it at the speed of a turtle."

PSFK - "Walkable Roller Coaster Connect People With Their Natural Surroundings"