As Airbnb has expanded, it's come under fire from ornery landlords and wary neighbors—being blamed, in at least one case, for driving up citywide rent prices. But at the same time, Airbnb gives us access to an unprecedented number of otherwise inaccessible buildings. For example: Right now on Airbnb, you can stay overnight in a home designed by Frank Lloyd Wright and a home designed by his son, Lloyd Wright.