Crazy Horse Memorial

This monument, 15 miles from Mount Rushmore, but on private land, has been under construction for more than 70 years.

Henry Standing Bear (Mato Naji), an Oglala Lakota chief, had petitioned Gutzon Borglum to add Crazy Horse to Mount Rushmore, but Borglum never responded. Standing Bear then made a deal with the government, trading some of his own land for a permit to build on the mountain, and commissioned Korczak Ziolkowski, who had worked on Mount Rushmore, to create the memorial. The Ziolkowski family (now children and grandchildren) is still overseeing the project. Although all of the funding is private, and no state or federal funds are used, there have been questions about how the money is being used, especially among some of the Lakota people.

I don't know enough about it to comment, but it's not just a giant sculpture. There is a college campus onsite that offers summer programs for students of Native American descent, and a really interesting art gallery in the visitor's center.