Michael Townsend and his wife, Adriana Yoto, became famous for building a secret apartment inside a large shopping mall in Providence without detection for four years. Make magazine publishes an interview with the couple in issue #14.
I know we at Houston 2600 have discussed this topic, as we are seeking to find our own “hacker space.” They reveal some of the details about how they managed to build the apartment and keep it hidden for so long.