This fantastic site was discovered in 1974 while a developer was excavating for a housing subdivision. The bulldozer unearthed gigantic bones and ivory tusks while removing soil. This was once an ancient water-filled sinkhole. It had trapped any animal that fell in and could not escape the vertical and slippery edges. Dr. Larry Agenbroad from Chadron State College was contacted. When it was verified that these were mammoths, excitement ensued! It was decided to leave the majority of bones in position and let it become a ongoing dig site that the public could view. This is the largest collection of mammoth remains in the world. We enjoyed watching the staff at work and asking questions of them. Absolutely fascinating! Two links below to learn more. Enjoy!