None. An 'upward falling waterfall' is a contradiction in terms.
As the name indicates, waterfalls consists of water falling to a lower level. Water, nor any other object for that matter, can never 'fall upwards'.
If you have seen one nevertheless, it is most likely either an illusion or some kind of trick.
niagara falls
Niagra falls!
The Niagara Falls
Niagara Falls.
McWay Falls, CA.
The widest and most powerful waterfall in North America is Niagara Falls in New York.
The Olo'upena Falls (2,953 feet) in Hawaii.
no it's a waterfall hence, Niagra FALLS
The Niagara Falls
Angel Falls is the tallest waterfall in the world. Angel Falls is located in Venezuela. This waterfall is 3212 feet tall.
Angel Falls is the tallest waterfall in the world. It is in South America.
Niagara falls ========== In addition to Niagara Falls, there are also some much smaller falls on the Canada-US border in Quetico Provincial Park. There are three falls at Niagara. Two of them are in the USA. The Horseshoe Falls, the most spectacular of the three, is almost entirely within Canada.