My two previous posts are not-so-happy thoughts about downtown. Sorry about that. To balance those out, I thought I'd mention my favorite Cincinnati holiday tradition: the train display at the Cinergy--err, Duke Energy Building at 4th and Main.
300 train cars (0-gauge). 50 engines. 1,000 feet of track. Open 10-6 (except Sundays, when it's 12-5). What more do you need? According to Duke, more than 9,000,000 visitors have stopped by since the trains began running in 1946.
If you're new to the city and haven't seen this, it alone is worth the trip downtown (especially if you have kids). If you're a native who hasn't been to see the trains in a while, then come on down and refresh those childhood memories.