Infiltration, "the zine about going places you're not supposed to go," was a Toronto, Canada-based zine about urban exploration.
Infiltration featured first-person accounts of observational (not vandalistic) visits to "off-limits" areas, including abandoned buildings and steam tunnels. It was consistently popular through its run; its success spawned the book Access All Areas.
Until 2005, the print version of Infiltration was published, edited, and largely written by "Ninjalicious"; he published 25 issues. On August 23, 2005, he died from a terminal illness he had been battling for several months.
The print zine is no longer being published, but the official website is still being updated and has a lively forum centered around urban exploration.