Seriously, in my town we have the Slavery Museum (sorry, "Underground Railway Freedom Center") which can't make a dime, although we were told as taxpayers when we were conned into paying for its construction (well, not me) that it was going to bring millions of people to town to see it. Most of what it does do is have schools drag their precious children down to see how horrible slavery was (did you know that? I hadn't until they told me!) and re-instill the white guilt for what stopped a hundred years ago and the black bitterness for how horrible it was. (And once infected with that, well, you need all kinds of government assistance to overcome it!)
Seriously, a year ago the Center first insisted that despite what we were told about being self-sufficient within ten years, they needed a million dollars more tax money to stay open...and we didn't want to be known as the city that shut down the Freedom Center, did we? When that didn't work, they insisted they needed the money to...I'm not lying here...move the front door of the building to the other side, because since the City Council STILL hasn't gotten the Banks shopping district off the drawing board, the thing that REALLY is hurting the museum is that the front door faces empty, undeveloped landscape and not the city itself. (That's right, they have something so special that people won't walk 100 feet to go inside.) The real deal was when the city discovered that the free extra land they gave the Center for $1 "for future expansion" ten years ago would be better made into a shopping mall to bring people down to where the lonesome attraction is, the museum wanted...you guessed it...a MILLION dollars for that land they got free. (The local talk radio guys kept the heat on, making management look as silly and childish as they really were, and the land finally went back to the city.)
Seriously, on a purely financial basis, why would you build an attraction that's obvious purpose is to make people feel bad. Do you think that "the Tunnel of Shame" is something anyone but a few guilty Liberals are going to pay to visit?