Wishlisted by Matt Mayer
The third largest building in the world, and the heaviest, this monstrosity was ordered by Romania's dictator Nicolae Ceaușescu and built between 1984 and 1997. Despite costing 3 billion euros, it lies 70% empty. The electricity bill alone costs $6 million per year. The totalitarian architecture, which reminds Romanians of the dark days of dictatorship is unpopular, with many joking that the best thing about the view from the Palace of the Parliament is that it is the one view in Bucharest from where you don't have to see the Palace of the Parliament.
Strada Izvor 2-4, București, Romania