If you thought NEOM was the most precious brainchild of Saudi Arabia, then you're wrong. On Thursday, Saudi's Crown Prince, Mohammad bin Salman bin Abdulaziz, unveiled plans to supposedly build the world's largest downtown development in Riyadh called New Murabba, covering over seven square miles.

And that's not even close. Murabba's main character will be a ginormous, 400-meter-high, cubed skyscraper called the Mukaab. The Mukaab will be one of the largest structures - large enough to house 20 Empire State buildings.

Inspired by the Najdi architectural style, the Mukaab will comprise a first-of-its-kind "immersive" experience, thanks to cutting-edge digital and virtual technology with the latest holographic.

This means it could transport you to Mars one day and some other magical worlds the next day.

Sounds bonkers? We're still not done.

To top it all, the cube will encompass a tower on top of a spiral base. This tower will host tourist attractions, residential and hotel units, commercial spaces, and recreational facilities. The entire structure will be the tallest building in the city, a supertall skyscraper 400 meters long on each side.

Funded by the Public Investment Fund, the New Murabba is one of the many mega projects currently being developed in Saudi Arabia. It is part of the Saudi Vision 2030 plan to diversify the country's economy.

Another day, another futuristic city in Saudi Arabia

The entire development will be located over 19 square kilometers at the intersection of King Salman and King Khalid roads to the North West of Riyadh.

Meant to accommodate hundreds of thousands of residents, the New Murabba project will feature more than 104,000 residential units, 9,000 hotel rooms, and more than 980,000 sqm of retail space, as well as 1.4 million sqm of office space, 620,000 sqm of leisure assets, and 1.8 million sqm of space dedicated to community facilities.

The project is claimed to be built around the concept of sustainability, with green spaces and cycling paths, but one is yet to figure out how eco-friendly the architecture is.

Shockingly, the new Murabba Development Company will aim to develop the world’s largest downtown in Riyadh by 2030, which is not far away. Incidentally, Saudi Arabia's NEOM project and The Line have been widely criticized for their environmental impact and alleged human rights violations connected to the development.