Want to access most of the special airplane treats you’ll read about on TPG — inflight bars, first-class showers, suites with separate beds? You’ll likely need a premium-cabin ticket. For this particular onboard surprise, however, you only need to get yourself on the right plane.I’m talking about the bank of “lower-deck” lavatories, available on Lufthansa’s longest Airbus, the A340-600 (yup, it’s even a hair longer than the superjumbo A380!).https://www.instagram.com/p/B7dwyQCJUff/In addition to a bank of five lavatories, which are noticeably larger than what you’ll find in coach on most planes, the lower section of Lufthansa’s A340-600 sports a dedicated crew rest, with room for seven off-duty flight attendants. Now-defunct Thomas Cook had a similar lavatory arrangement on its Airbus A330s.Hoping to catch the A340-600 yourself? Lufthansa currently operates 17 of these extra-long planes. Aircraft assignments vary depending on the season and date, but, recently, the airline has flown its A346 on the following U.S. routes:Frankfurt (FRA)—Chicago (ORD)Frankfurt (FRA)—New York (JFK)Frankfurt (FRA)—San Francisco (SFO)Munich (MUC)—Boston (BOS)Munich (MUC)—Chicago (ORD)Munich (MUC)—Los Angeles (LAX)Munich (MUC)—New York (JFK)I wouldn’t go so far as to call this a special amenity — it’s a bank of fairly standard economy lavatories, after all — but, for enthusiasts, at least, it could be worth seeking out this plane for the novelty of being able to walk up and down a flight of stairs at 30,000 feet.Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.