A proposed new city in Saudi Arabia may include the world’s largest buildings:

NEOM, the brainchild of Saudi Crown Prince and de facto ruler Mohammed bin Salman, aims to build twin skyscrapers about 500 meters (1,640 feet) tall that stretch horizontally for dozens of miles, the people said.

The skyscrapers would house a mix of residential, retail and office space running from the Red Sea coast into the desert, the people said, asking not to be identified as the information is private. The plan is a shift from the concept announced last year of building a string of developments linked by underground hyper-speed rail, into a long continuous structure, the people said.

Designers were instructed to work on a half mile-long prototype, current and former NEOM employees said. If it goes forward in full, each structure would be larger than the world’s current biggest buildings, most of which are factories or malls rather than residential communities.

Imagine a building that stretches on for miles. As one follows it with their eye, it just keeps going and going. A building that goes past the horizon.

How does one get around within such a building? Moving walkways? Segways? An interior mass transit system? Or, exit the building and use a vehicle out there?

I could imagine a fairly self-contained community inside such a building. Going outside might not be very necessary except for going to a different city. What an American suburbanite might desire to be within a ten minute drive just happens to all be in the same structure.

Since this is in the planning stages, it could be years for the development to arise and stretch out to the point where the buildings are the largest and/or longest in the world.