Ventilation, electric lights, and wagons so your arms don't get tired from carrying all those drugs—those wonderful upgrades were found in a drug-smuggling tunnel from Sonora, Mexico to Arizona by the Mexican army this week. It's the 22nd tunnel discovered in the past three years, The BBC reports. The video (below) still gives us and anyone with a slight case of claustrophobia a queasy feeling, and according to The Associated Press, it's about four feet high, plunges to a vertigo-inducing depth of about 59 feet below ground, and is about 750 feet long. Yes, if we were narcotics officials we'd probably let our robot do the work for us (they have those you know).

Officials still don't know which cartel is responsible for this well-appointed tunnel.