This place is a wonder.  The building dates back 150 years, and has seen duty as a cornstarch factory, a wooden pump factory, an oat mill, a broom factory, a pickle factory(!), a soda bottler, and a hand-powered wooden washing machine factory.  It has been a restaurant since 1976, when Dorothy Stitt bought it.
 
The orange neon sign you can't make out says "Immediate Seating;" it's supposed to give the town of Cedar Falls a heads-up about how long the wait is.  We were there prime-time on a Saturday night, and I'm sure the sign stayed lit the whole night.  In fact, I'm sure it's always lit; popularity-wise, the restaurant has certainly seen better days.  There is a beautiful bar, which was unmanned and empty, and (we were told) has been for a few years:
 
Dorothy, too, has probably seen better days; though she greets you when you walk in, and is world-classedly charming + friendly, she is somewhat slowed by an oxygen tank.  Still, it is clearly Dorothy's place. The walls are decorated with her paintings (farm-time landscapes, mostly-- some painted on actual barn doors).  In the lobby she displays her egg sculptures: using (among other things) dental drills, she fashions scenes out of ostrich and emu eggs:
 
(Incidentally, she raises the emus herself.)
The restaurant overlooks the Cedar River, and sits next to an active railroad bridge.   (Two trains passed during our dinner.)  The second floor has a number of function rooms, where they host weddings and cooking classes.  All of the fixtures are old and interesting, and together with Dorothy's unique art, gives the place a kind of folksy, House-on-the-Rock feel.
So the last thing you'd expect from a place like this is good food.  Which is why my mind was basically blown when, lo, there it was: 
very good food.  If I had put 2 + 2 together-- the emu on the menu = the emu raised by Dorothy-- I would have gone with that for sure, but I let the waitress talk me out of it.  Instead I had the "Amish Chicken," which looks like this:
 
Fine, right?  Perfectly ordinary looking chicken, right?  Except, it was 
exceptional.  The chicken has to marinate for a day, and I was almost too early to order it.  There must be some smoking involved, because the bird-- in addition to that perfect crispy-outside/juicy-inside ratio-- had a faint, beautiful hint of smokiness.  It was really wonderful.  My companion's beef medallions were not as super-terrific, but came with a very tasty whipped rutabaga accompaniment.**
We tried two of the three house-made desserts, bread pudding and pecan pie.  Both were delicious; of special note is the bread pudding's ultra-rummy sauce.
The chef is Alex Martinov-- "Chef Alex--" whose Special Award from the Beef Industry Council is displayed along with lots of other Broom Factory-related news clippings (including those charting the career of a Young and the Restless star who once worked there).  Chef Alex, a native Bulgarian, graduated from Le Cordon Bleu in Paris; I have no idea what he's doing in Cedar Rapids, Iowa.
In sum: the Broom Factory is a living improbability on six or seven levels, not least of which is its delicious food.  If you have reason to be anywhere near Cedar Falls/Waterloo, well, it's pretty much a no-brainer.
The Broom Factory Restaurant
125 West First Street
Cedar Falls, Iowa
(319) 268.0877
http://thebroomfactory.com
** Actually, this may have been whipped parsnip?  Now I don't remember.