NAGOYA -- Two regional railway operators and Mitsui Fudosan will build a 50- to 60-story skyscraper at Nagoya Station at a total cost of some 200 billion yen ($1.65 billion).

What is the tallest skyscraper we could build? This video explains how tall we could really build and compares the sizes of the Burj Khalifa, Jeddah Tower, X-Seed 4000, Tokyo Tower of Babel, The ...