(01 of37)
Open Image ModalIce and snow covered the frozen Niagara Falls on the Canadian side in St. Catharines, Canada, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(02 of37)
Open Image ModalIce and snow covered the frozen Niagara Falls on the Canadian side in St. Catharines, Canada, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(03 of37)
Open Image ModalIce and snow covered the frozen Niagara Falls on the Canadian side in St. Catharines, Canada, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(04 of37)
Open Image ModalColourful lightds spots illuminated thewinter scenery of the ice and snow covered frozen Niagara Falls on the US side in Wheatfiel, USA, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(05 of37)
Open Image ModalIce and snow covered the frozen Niagara Falls on the Canadian side in St. Catharines, Canada, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(06 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., on February 19, 2015. It's a stunning site: Niagara Falls, the world's most famous waterfall, apparently frozen in place. The icy spectacle, brought on by weeks of severe cold, has drawn a steady flow of intrepid tourists. But are the Falls really frozen? Not exactly. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(07 of37)
Open Image ModalIce and snow covered the frozen Niagara Falls on the Canadian side in St. Catharines, Canada, 24 February 2015. Photo: Chris Melzer/dpa (credit:Chris Melzer/DPA)
(08 of37)
Open Image ModalVisitors look over masses of ice formed around the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., on February 19, 2015. It's a stunning site: Niagara Falls, the world's most famous waterfall, apparently frozen in place. The icy spectacle, brought on by weeks of severe cold, has drawn a steady flow of intrepid tourists. But are the Falls really frozen? Not exactly. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(09 of37)
Open Image ModalPieces of ice flow over the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., on February 19, 2015. It's a stunning site: Niagara Falls, the world's most famous waterfall, apparently frozen in place. The icy spectacle, brought on by weeks of severe cold, has drawn a steady flow of intrepid tourists. But are the Falls really frozen? Not exactly. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(10 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., on February 19, 2015. It's a stunning site: Niagara Falls, the world's most famous waterfall, apparently frozen in place. The icy spectacle, brought on by weeks of severe cold, has drawn a steady flow of intrepid tourists. But are the Falls really frozen? Not exactly. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(11 of37)
Open Image Modal (credit:Reuters)
(12 of37)
Open Image Modal (credit:Reuters)
(13 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(14 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(15 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(16 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(17 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(18 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(19 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(20 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(21 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(22 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(23 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(24 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(25 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(26 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(27 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(28 of37)
Open Image Modal (credit:Buffalo News/Sara Meehan/Derek Gee)
(29 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(30 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(31 of37)
Open Image ModalMasses of ice formed around the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(32 of37)
Open Image ModalPieces of ice flow over the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(33 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(34 of37)
Open Image ModalPieces of ice flow over the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(35 of37)
Open Image ModalNiagara Falls State Park visitors look over masses of ice formed around the American Falls, photographed from across the Niagara River in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(36 of37)
Open Image ModalVisitors look over masses of ice formed around the Canadian 'Horseshoe' Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)
(37 of37)
Open Image ModalMasses of ice formed in the lower Niagara River and around the American Falls in Niagara Falls, Ont., Thursday, February 19, 2015. THE CANADIAN PRESS/Aaron Lynett (credit:Aaron Lynett/The Canadian Press)