Travelers are voting Engelsberg Ironworks, Jesuit Block and Estancias of Cordoba and Mehmed Pasa Sokolovic Bridge as the best of 7577 key buildings in the World. Also popular are Derwent Valley Mills in England, Taj Mahal in India and Ir.D.F. Woudagemaal in Netherlands. Want more? Check out our map of key buildings in the World or these 609 key buildings in India.