[In Pictures] Niagara Falls freezes over

The Niagara Falls are a spectacular sight all year round, but perhaps even more so when they freeze over. That is what happened this week, when temperatures along that part of the US-Canada border fell to -14 degrees Celsius on Monday.

Though the falls were not exactly frozen solid – water continued to cascade through the world’s largest waterfall in terms of flow-rate – there was an impressive and extremely picturesque build-up of ice.