Clocktower Tunnels

The Clocktower Tunnels are a set of tunnels located under the clocktower in Willamette Parkview Mall's Leisure Park. After Ed crashes into the clocktower, Frank discovers that there is a tunnel under it filled with zombies. He shows Isabella, who discovers that the remains of her antidote she used on Frank seem to repel the zombies. When inside the tunnels, Frank must hold hands with Isabella so that the repellant effects both of them. There are several points where Isabella must crawl through a drain to open a switch to get through grates blocking the tunnels. Near the end of the tunnels, special forces appear. At this point, the repellant is weaker, and Frank must carry Isabella. Once they pull a switch to open a gate, they manage to evade special forces and escape on a jeep.

Trivia

 * It is unknown how far away from the mall the tunnels take Frank.