In its salad days, I always thought the 20th Century Limited by-passed Cleveland using Lake front trackage. However, postings in another web-site suggest that the 2nd (and possibly other) sections of the 20th Century did indeed stop at Terminal Tower to pick-up and discharge passengers. Is there any documented proof of this occurance?
All sections of the Century (Trains Nos. 25 & 26) stopped in Cleveland only for a crew change, servicing, and mail relay at Collinwood.
In steam days, the time lost for 2 engine changes and running via CUT was prohibitive, and in both directions the trains were late at night.
Cleveland had #'s 57 & 58 (Cleveland Limited) which provided all-Pullman service to / from New York City as well as numerous other trains which also provided service.
For a very brief period c. 1965-66, the eastbound Century did run via CUT to handle mail, but the loss of time was too much and the train resumed running via the Lakefront Line.
Hope this helps.