What significant feature is located in the Hiawatha National Forest?

The significant feature located in Hiawatha National Forest is indeed recognized for having the largest known dune in the eastern United States. This aspect highlights the unique geological formations found within the forest, showcasing a dynamic landscape shaped by both natural forces and environmental conditions. The presence of this dune emphasizes the ecological diversity and recreational opportunities that the Hiawatha National Forest offers.

In contrast, while Michigan does have the highest peak, the largest lake, and many old forests, these features are located elsewhere in the state. The highest peak, Mount Arvon, is located in the Houghton County area, and Lake Superior is the largest lake in Michigan, but it is not within Hiawatha National Forest. Similarly, while Michigan has ancient forests, none are specifically designated as the oldest in the country within this national forest.