The pasta that is shaped like a waterfall is Cascatelli.
Cascatelli pasta is a relatively new pasta shape that was designed by Dan Pashman.
Dan Pashman is the host of the Sporkful podcast.
The name cascatelli is derived from the Italian word for "waterfall".
Cascatelli pasta has a wavy, ruffled shape that has a curved, half tube that was designed and inspired by the cascading appearance of a waterfall.
Dan Pashman designed the Cascatelli pasta with a focus on maximizing the amount of pasta sauce that the cascatelli pasta can hold and deliver in each bite.
The shape of the cascatelli pasta also provides a pleasing textural experience with it's ruffles and hollowed out center.
And the design of the cascatelli pasta is also designed and intended to be easily picked up using a fork.