German airline Lufthansa is retiring its iconic Airbus A340-600 in a final flight this weekend from Washington to Frankfurt. The four-engine jet is the second-longest passenger plane ever built, with a long-haul range of almost 13,000 kilometers (8,100 miles).

But most people know the plane for this particular detail, the downstairs toilets! DW spoke with aviation content creator Marc Plaetrich of The Airlinetester YouTube channel, on what made the A340-600 so special.