This one photo shows how much of an engineering feat 'El Chapo' Guzmán's escape from prison was

When Sinaloa cartel boss Joaquín "El Chapo" Guzmán escaped from prison in central Mexico on July 11, the event was quickly regarded as a stunning criminal feat.

It was soon discovered — as shown by the display below, from a new exhibit at The Mob Museum in Las Vegas — that the escape was also a marvel of clandestine engineering, featuring an elaborate tunnel passage designed by engineers trained in Germany specifically to build the tunnel.

Guzmán entered the mile-long tunnel through a hole in the floor of his cell's shower with a length and width of 1 1/2 feet. He then descended a 32-foot ladder into the tunnel, which was 5 1/2 feet high and 2 feet 7 inches wide.

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