The dam was listed as a National Historic Landmark in 1963.

The old fort is also listed as a National Historic Landmark.

In 2003, the lodge was listed as a National Historic Landmark.

In 1960, it was listed as a National Historic Landmark.

Several years ago, town officials got it listed as a National Historic Landmark.

It was listed as a National Historic Landmark in 1992.

In 1997, she was listed as a National Historic Landmark.

She has since been restored, and is listed as a National Historic Landmark.

In 1964, the site was listed as a National Historic Landmark.

The park's natural area was listed as a National Natural Landmark in 1965.