[victor]

Hypercities is a collaborative research and educational platform for traveling back in time to explore the historical layers of city spaces in an interactive, hypermedia environment.

A HyperCity is a real city overlaid with a rich array of geo-temporal information, ranging from urban cartographies and media representations to family genealogies and the stories of the people and diverse communities who live and lived there. We are currently developing content for: Los Angeles, New York, Chicago, Rome, Lima, Ollantaytambo, Berlin, Tel Aviv, Tehran, Saigon, Toyko, Shanghai, Seoul, with many more (big and small) to come.

Though they do not have Toronto yet but it's pretty interesting to roam through the other cities.

Main site - http://hypercities.com/
Map site - http://hypercities.ats.ucla.edu/