The Bionic Tower is a proposed vertical city, an extremely large building designed for human habitation designed by Spanish architects Eloy Celaya, Mª Rosa Cervera, and Javier Gómez. It would have a main tower 1,228 metres (4,029 ft) high, with 300 stories housing approximately 100,000 people. The bionic tower would be exactly 400 meters taller than the current tallest building, Burj Khalifa.