Exterminator

Kennywood's original property line had left the park landlocked for decades, so when it announced Exterminator in September 1998 as its sixth roller coaster, the site chosen sat just outside those original boundaries, bordering a residential neighborhood — a location that made an enclosed, indoor coaster a practical necessity as much as a creative choice.

French manufacturer Reverchon Industries supplied its then-novel Spinning Coaster model, the first of its kind to be installed indoors anywhere in the United States, while California-based R&R Creative Amusement Designs built the ride's storyline: guests play rats trying to escape a building overrun by Kennywood's own exterminators. Sally Corporation designed four animatronic exterminator figures that appear throughout the darkened 1,378-foot layout, which begins with forward-facing wild-mouse switchbacks before the cars spin freely through the finale.

Kennywood held a media preview for enthusiast groups on April 16, 1999, two days ahead of Exterminator's public debut on April 18. It became the first attraction built entirely outside the park's historic footprint, and Reverchon's model would later be replicated worldwide, though the manufacturer itself has since gone out of business.

More than 25 years later, Exterminator remains one of only a handful of Reverchon spinning coasters still operating in the United States and one of Lost Kennywood's most distinctly themed attractions.