Terrifyingly high above the streets of Toronto, Tom Ryaboi peers out at the city in front of him.  Dangerous and daring, the growing craze of 'Rooftopping' photography takes place hundreds of feet above the streets. A dedicated few 'Rooftoppers' are determined to climb to the top of every skyscraper roof in their city, hang off the edge and photograph the evidence as proof.

Check out the photo's here.