Haystack Falls on the Going-to-the-Sun Road in Glacier National Park, Montana.
Haystack Falls is a prominent waterfall located along the scenic Going-to-the-Sun Road, a famous route within Glacier National Park.
It is known for its distinctive feature where the waterfall cascades over and under the road via a culvert, allowing vehicles to drive directly over it.
The falls are situated about two miles up the road from "The Loop" section of Going-to-the-Sun Road.
The Haystack Creek Culvert, which carries the falls under the road, is one of the notable stone-masonry structures found along this historic roadway.