this is nick tilson of and krystal two bulls of the northern cheyenne and lakota.s also a military veteran. we met at the entrance of mount rushmore park there with the ndn collective, an indigenous nonprofit fighting to get indigenous lands back into indigenous hands. >> our people this was a sacred site that they blew up to carve the faces of the four presidents into it. >> wow. of all the places to put that. >> now you can see it's turned it into a tourist attraction. >> reporter: as the indigenous folks say, since time immemorial, this land has been their home. the black hills was home to more than 50 indigenous people. and in 1868 the fort laramie treaty which designated for the absolute and undisturbed use of the great sioux nation, which encompasses dozens of tribes. this land, first of all is your land, it's indigenous land. colonizers come in. even after that, a treaty is negotiated that mount rushmore is treaty land. >> it's in those treaties that people don't get to come on these lands without first consulting us and having conversation and consent from