Though a satellite’s view of a vertical feature on Earth may not be the most flattering angle, this image of Niagara Falls is impressive. The Niagara River drops nearly 170 feet to form one of the world’s largest waterfall, shown above in an image taken by GeoEye’s Ikonos satellite in August 2004. More than 1.7 million gallons of water runs over the edge every second, constantly eating away at the rock below and pushing it back as much as 20 feet in a year.
A close-up of the falls from the same image is below, reoriented for a better perspective. Below that is a view of the entire Niagara River between Lake Ontario in the north and Lake Erie in the south, taken by astronauts aboard the International Space Station in 2007.