These mammoth tusk pieces are on display at the Falls of the Ohio State Park Interpretive Center. They thought to be 12,000 to 20,000 years old. The tusks were unearthed at the Nugent Sand Company quarry in Bethlehem, Indiana, USA. Studying the dentine layers on these tusks can help researchers determine the age of the creature when it died.
I have not seen Indiana tusks in this good of condition before. If you get chance, try to visit as they have quite a few fossils and artifacts on display.