The iTacitus project is one being carried out in the European Union that essentially uses augmented reality to create mobile phone time machines that show a given location as it appeared centuries ago.
The iTacitus program's augmented reality recovers historic photographs and videos, allowing mobile phone users to simultaneously visit any given site in the past and the present.
Virtual Time Machines
Time Machine Photography
Car Wash Time Machines
Retro Arcade Booths
iTacitus' Augmented Reality Turns Phones Into Time Machines
By: Alejandro Bonilla Moreno - Published: Aug 23, 2009 Updated: Mar 31 2011 • References: itacitus.org