Built in 1902, Leap-the-Dips is America's last side friction roller coaster still in operation, and is the world's oldest roller coaster. The Lakemont Park roller coaster was closed down in 1985, then restored and reopened in 1997, thanks to a hugely successful fundraising campaign. Located in Altoona, Pennsylvania the roller coaster was buit by the E. Joy Morris Company. Even though the drop height is only 9 feet, and it only goes 18 mph, it's the "dips" that makes this roller coaster so amazing.
Side-friction wooden roller coasters are held on the track by the friction that the wheels generate. In fact, some riders have reported that the wheels of the cars in the rear have even left the track during some of the dips. Today, the Leap-The-Dips roller coaster is listed on the National Register of Historic Places. In 1996, it was also officially declared to be a National Historic Landmark.