I've got a question concerning the following sentences.<br/><br/>In Barcelona, not only are the buildings beautiful, but the climate is also wonderful.<br/><br/>and<br/><br/>Not only the bathroom was flooded, but also the rest of the house.<br/><br/>The second sentence is correct for sure as it's taken from Practical English Usage by Michael Swan.<br/><br/>My question concerns inversion. Aren't these two sentences similar in terms of structure? If so, isn't inversion in the first sentence incorrect then?