Tall Tower Showdown

The CN Tower has been world's tallest free-standing structure, it's a mantra that almost all Torontonians can recite, and it's been that way for around three decades. Well, it seems like the CN tower's record holding status is being challenged by not one or two but by at least three challengers. The latest is in Tokyo, where NHK, Japan's national broadcaster is planning a tower that'll dwarf good old CN.

Dubai, where skyhills and hockey teams, exist cheek by jowl with camels and desert, has got a tower planned. And China, has got not one but two towers planned, one in Guangzhou and another in Shanghai.