London Mayor Boris Johnson helped break ground on spiral tower to be built next to the 2012 Olympic Stadium.
Work began on the 337 foot ArcelorMittal Orbit on Thursday. Johnson said the tower will be an attraction to draw people to the Olympic Park after the 2012 Games are over.
Responding to criticism of the unique design that resembles an upended trombone, Johnson says "like it or not, it's something people will be interested in looking at."
Johnson said businesses will be attracted to the park, which Prime Minister David Cameron wants to rival California's Silicon Valley as a home for leading technology companies.