I visited Cincinnati the first week in September to see my beloved Cardinals take on the Reds during a red hot pennant race, so the Reds Hall of Fame & Museum was the first place I checked out. Definitely a MUST for ALL baseball fans.
Located right next to Great American Ballpark, I opted to pay a few extra dollars for the ballpark tour. I highly recommend it! I ended up with a private tour, but even small group tours will gain great access to parts of the park that fans normally don't see--tunnels behind the clubhouses, inside the press box, and onto the field and into the Reds dugout. My guide was excellent, and typical for the type of baseball fan you find in Cincinnati--knowledgeable about baseball history, Reds history and trivia, and respectful/good humored to "enemy" fans.
The museum itself is very extensive and celebrates Cincinnati Reds rich baseball lore and history. This is very appropriate since Major League Baseball traces its origins to 1869 with the Reds being among the first teams. I've seen a few other local baseball hall of fame facilities (including one in St. Louis and a very good one in Kansas City), but the Cincinnati museum ranks right after Cooperstown as the best baseball hall of fame in the U.S.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.