So while August Kreis may be calling, there is no sign that al Qaeda is listening.

CNN: An unholy alliance

"The message is, the cells are out here and they are already in place, " Kreis said.

CNN: An unholy alliance

If it exists anywhere, he said, it is in the mind (and the Internet postings) of August Kreis.

CNN: An unholy alliance

In Kreis 3, the areas around Idaplatz and Goldbrunnenplatz have become increasingly popular.

BBC: Living in: Zurich

As we ended our interview, we asked Kreis if he had any message for Osama bin Laden and his lieutenants.

CNN: An unholy alliance

Zurich has 12 kreis, or districts, many of which contain multiple neighbourhoods.

BBC: Living in: Zurich

Farther away from the centre and down the lakeshore, Wollishofen in Kreis 2 and on the other shore, Seefeld in Kreis 8 and Zurichberg in Kreis 7, are very popular.

BBC: Living in: Zurich