The oldest former coaster I remember riding was the second Wildcat. I was a little disappointed when Cedar Point removed to only to make room for their Celebration Plaza, but there are plenty of other roller coasters to make me soon forget missing it. There are only three former coasters that I remember riding. Wildcat, Disaster Transport/Avalanche Run and Mean Streak.
Some of the first roller coasters looked pretty unsafe, which made them a little more exciting. I never knew there were so many former roller coasters at Cedar Point, including Cyclone that apparently broke bones?