Inside Saudi Arabia’s Plan to Build a Skyscraper That Stretches for 75 Miles

When Saudi Crown Prince Mohammed bin Salman directed authorities to develop land in the kingdom’s arid northwest, he demanded something as ambitious as Egypt’s pyramids.

What urban planners came up with in response are plans for the world’s largest structure: two buildings up to 1,600 feet tall, running parallel for 75 miles in a line across coastal, mountain and desert terrain, connected via walkways, according to hundreds of pages of confidential planning documents that lay out the idea for the first time in detail.