Private aircraft are the epitome of luxury, but many of them feature standard-issue interiors designed and built at the same facility that constructs the rest of the aircraft. Manufacturers of jets and helicopters offer in-house design services that allow aircraft owners to customize their interiors to a very high degree. But the next level of luxury comes when owners order empty (or “green”) aircraft without any interior elements, choosing instead to employ an outside firm to design and build a cabin unlike anything else in the sky. With this list of 20 jaw-dropping aircraft interiors, we celebrate these elite cabin designs, which take the extravagance of private aviation to a new stratosphere of luxury.