Jo Teeuwisse is a historical consultant and, apparently, a Photoshop genius. Her work involves taking photos of Amsterdam during the 1940s and then superimposing them on modern photos. The results are these amazing, ghostly collisions of past and present. You can see more (plus the original old photos) on the project's Flickr page. The captions are hers, and all images are used with permission.

"Liberation Parade on June 29, 1945 in the Vijzelstraat, Amsterdam."

"We see three members of the scouting movement. The scouts had been forbidden by the Nazis and as soon as the war came to an end they put on their old uniforms and started helping the resistance and the Allies."

"Here you see the SS recruitment office. A member of the resistance took this with his camera probably hidden under his coat."

"Liberation Parade on June 29, 1945 in the Vijzelstraat, Amsterdam."

"Molenkade in Duivendrecht, may 1945, people are waiting for the liberators."

Photo by Kees.

"Reguliersgracht in Amsterdam, these people worked in a factory, the office part was perhaps on one of these buildings."

"A group of young factory workers posing probably outside the factory during the war."