Border Tunnel

The Border Tunnel is a location in Fear the Walking Dead Passage.

Pre-Apocalypse
Not much is known about the Border Tunnel before the outbreak. It is implied to be a passage under the border for drug runners and other illegal activity. The U.S. Border Patrol was in the process of filling in the tunnel when the infection hit.

Post-Apocalypse
It's entrance is located underneath a construction site and it runs under The Border (Fear the Walking Dead) between The United States of America and Mexico. It is, at first, implied that The Tunnel was/is being used for the purposes of illegal emigration and the smuggling of contraband. Both Gabi and Sierra believe it to be a way to cross to the (perceived) safety of Mexico. However, The Tunnel is booby-trapped and houses several Infected as well as several Boarder Patrol guards. It is revealed by Colton that The Tunnel in facts houses a bunker and that several members of the Boarder Patrol were going to use the bunker to hide out and escape the Infected.