When rivers are rerouted or dammed, or when lakes or reservoirs are built, previously dry land becomes part of the waterway. Most buildings in such places are either torn down or are eventually destroyed by the water, but some large stone edifices survive even under water. See eight of these building that only stick out a little above the surface, or only peek out now and again. Plus a bonus: a formerly drowned church in Venezuela that, due to a severe drought, is now on dry land again. Pictured here is the Church Of Altgraun In Lake Reschen, Italy. Link

(Image credit: Wikipedia user Markus Bernet)