A Danish architecture firm and an Arizona real estate developer are proposing a 420-foot modernistic observation tower that would be located in downtown Phoenix and billed as a tourist destination.

That would make the tower close to 39 stories and the tallest building in Arizona.

Bjark Ingels Group (BIG) designed the proposed Phoenix Observation Tower. Novawest LLC owns real estate in Phoenix and wants to locate the tower near the Arizona Science Center, Phoenix Convention Center and US Airways Center.

“This is the right place and the right time for a signature project for downtown Phoenix and we knew the design needed to be something extraordinary. Big has delivered something exceptional, blending form and function in a way that will change the local skyline forever and will give visitors a once-in-a-lifetime experience.” said Brian Stowell, a Novawest principal. The architecture firm unveiled the tower plans Wednesday evening. The tower includes an open-air spiral sphere at the top and could also include restaurants and special event space.

Novawest wants to locate the modern structure near the Arizona Science Center or the corner of 6th and Adams streets at the southwest edge of Heritage Square in Phoenix.

The BIG architecture firm specializes in a variety of unique designs and structures. It has designed buildings in France, Norway, Iceland, Denmark, Germany, Abu Dhabi and Taiwan.

Click here for the future Phoenix landmark.