<a href="https://en.wikipedia.org/wiki/Tokyo_Skytree" id="mwAbk" rel="mw:WikiLink" title="Tokyo Skytree">Tokyo Skytree</a> opens to the public. It is the <a href="https://en.wikipedia.org/wiki/List_of_tallest_towers" id="mwAbo" rel="mw:WikiLink" title="List of tallest towers">tallest tower in the world</a> (634 m), and the second tallest man-made structure on Earth after <a href="https://en.wikipedia.org/wiki/Burj_Khalifa" id="mwAbs" rel="mw:WikiLink" title="Burj Khalifa">Burj Khalifa</a> (829.8 m).