." >> reporter: in sedalia, missouri, an old cliche runs through the center of town. here the railroad track still separates the mostly black part of sedalia from the mostly white. and it is on the black side that a white woman built this, a slave cabin, complete with cotton crop. it has not gone over well. >> just brings back thoughts of, you know, injustice. >> that's like building a concentration camp in an all-jewish neighborhood. >> reporter: with so much racial tension in america, you've got to wonder why anyone would build such a thing. then again, with so much racial tension in america, you might want to step inside before you judge. >> we needed to come together. >> reporter: 85-year-old marge harlan built the slave cabin on library. >> we have a whole collection of books. these can all be checked out. >> reporter: she opened the library in 2013, partly to try to start a conversation about race in her community. all your money to do this? >> yes. >> reporter: she spent more than $150,000 on it. yet, almost no one cared, or came. >> the library was going nowhe