Architecture in Tokyo has largely been shaped by Tokyo's history. Twice in recent history has the metropolis been left in ruins: first in the 1923 Great Kantō earthquake and later after extensive firebombing in World War II. Because of this, Tokyo's urban landscape consists mainly of modern and contemporary architecture, and older buildings are scarce. Tokyo features many internationally famous forms of modern architecture including Tokyo International Forum, Asahi Beer Hall, Mode Gakuen Cocoon Tower, NTT Docomo Yoyogi Building and Rainbow Bridge. Tokyo also features two distinctive towers: Tokyo Tower, and the new Tokyo Skytree, which is the tallest tower in both Japan and the world, and the second tallest structure in the world after the Burj Khalifa in Dubai. Mori Building Co started work on Tokyo's new tallest building which is set to be finished in March 2023. The project will cost 580 billion yen ($5.5 billion).