'The Ledge' Tilting Windows In Chicago's John Hancock Tower Are Incredible And Slightly Insane

Engineers in Chicago have taken the rather insane yet utterly enthralling step of installing tilting windows in the very tall John Hancock Centre skyscraper.

A massive 94 floors (304m) up, the tilts you 30 degrees towards the sprawling city streets below as you grip on to metal bars, presumably fearing for your life.

The incredible feature is part of a massive renovation of the building's observation deck.

For an account of what it's like read the Chicago Tribune article here.

(Via Sploid)