Footage shot by ABC News and other video shared by the Mexican government show electricity and lights in the tunnel supported by a generator.
The tunnel runs nearly a mile underground from his cell in the Altiplano maximum-security prison to the outside world.
Joaquin “El Chapo” Guzman broke free from his cell using the tunnel Saturday evening and no official spotting has been confirmed since.
The ventilated tunnel was built to accommodate Guzman’s height of 5 feet, 6 inches. The drug kingpin's nickname is a play on his height: “El Chapo” means "shorty," or "the short one," in Spanish.
A deeper portion of the tunnel featured an adapted motorcycle on rails, which can be seen from one of the tunnel entrances.
Authorities estimate that the people responsible for making the tunnel must have removed roughly 379 truckloads of dirt.
Guzman entered the tunnel from one entrance located in the shower area of his cell, and then he is believed to have gotten out from an exit that opened into a half-built house outside the grounds of the prison.