Gazing up at the 65-metre Port of Montreal Tower and its glass-bottom outlook, one thought crossed my mind: nope. If the idea of entrusting your life to a transparent ledge scares the living daylights out of you, you're not alone. But I was determined not to let the dizzying pull of vertigo stop me from checking out the unmissable new structure at the end of the Old Port's Grand Quay.