What’s The Mukaab? It’s an ornate, new shopping and entertainment cube that the city of Riyadh in Saudi Arabia wants to build.

It’s not any ordinary cube, either. The proposed Mukaab could hold up to 20 Empire State Buildings. It’s planned to tower up 400 meters, roughly 1,312 feet tall.

You can not only shop to your heart’s content, but also experience the “world’s first immersive, experiential destination,” changing from day to day. It’s said “you enter a new reality – transported to Mars one day, and magical worlds the next.”

This complex is set to be completed by 2030. More from a skeptical Hugo Talks.