ANSWER:
The greatest feature would be Niagara Falls. Located between Canada and the United States, over 10 million people visit this historical place each year.
It's believed that Niagara Falls was formed about 12,000 years ago, after the last great ice sheet melted from the region.
The magnificence and power of the flowing and crashing water gives a special performance for anyone to enjoy.
There's special areas, where you can walk down toward the water, and climb stairs to higher spots to get a closer look at the water and the water falls.
Various colored lights were added as a feature attraction for those who visit, to enjoy the flowing and falling waters at night.
land and water
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there are mountains in both countries.
there are many. the great lakes atlantic pacific rockies great plains and Niagra Falls
niagara falls, and grand canyon.
Glaciers, right? -^-^-
Mountains I guess?
Appalachian mountains
Both of these countries have the primary language of English. they also are majority christains in these countries
The physical features that form the boundaries of the United States are the Atlantic Ocean to the east, the Pacific Ocean to the west, Canada to the north, and Mexico to the south.
they are only one thing us mexico and canada share.
Mountains ranges, plains, Great Lakes, similar coast lines and climates.