Welcome to the Shoshone Bird Museum of Natural History Online! The Shoshone Bird Museum of Natural History is located at the same location as Idaho's Mammoth Cave, located 8 miles north of Shoshone, Idaho, on scenic state highway 75. Summer hours are 9 a.m. to 6 p.m., 7 days a week. Idaho's Mammoth Cave and Museum admission rate Adults, $8.00 16 and under, $4.00 6 and under, Free