10. AT&T Long Lines Building The AT&T Longs Lines building houses all of AT&Ts important cables. This concrete monster could fit a miniature city inside of it completely impenetrable to the horde. Advantages: -Large indoor space -Plenty of iPhones Disadvantages: -Dropped calls -Spotty coverage see the rest Top Ten Post-Apocalyptic Zombie Forts | Always Something Cool #4 looks fun. Although so does #8. Hard choice.