loopy tower

London Olympic Tower By Anish Kapoor
quoted from Designyearbook:

A spiraling red tower, dubbed "Orbit," designed by Turner prize-winning artist Anish Kapoor was named the winner of the competition to design the new “Olympic Tower” for the upcoming 2012 Olympic Games in London. As Britain biggest piece of public art, the 394-foot snaking steel tower will allow people to climb, giving a spectacular view of London.

now, imagine if that's a roller coaster circuit! :D funnn!!!