During the brief time it was open, the Turtle building in Niagara Falls, N.Y. served as the Native American Center for the Living Arts. It was designed by Northern Arapaho architect Dennis Sun Rhodes. Now it stands vacant and is in the way of a proposal for a high-rise hotel. It is on the most recent list of Most Endangered Places by the National Trust for Historic Preservation. Another place on the list is the Pamunkey Indian Reservation. Tribal leaders say their land will be underwater within the next 65 years. We’ll hear about some of the threatened historic places and the efforts to save them.