A busy afternoon on the Grand Canal in Venice is rendered eerily quiet thanks to a neutral density filter and a long exposure. Taken from the square by the Guggenheim museum, this location just down from the famous Accademia bridge (think Canaletto) is always buzzing with boats. The faint blur of one that passed during the exposure can be seen on the much-flattened water.
Canon 40D with Canon 10-22mm EFS lens at 15mm and a ND 3.0 1000x filter, ISO 100, f10 20 seconds