From the record
“The Cricket Tunnel and Crest Tunnel are a pair of railroad tunnels in northern Arkansas, near the city of Omaha in Boone County. The Crest Tunnel, at 3,500 feet (1,100 m) is the longest tunnel in Arkansas, and is its only curved tunnel.”
Wikipedia article Cricket and Crest Tunnels, CC BY-SA 4.0.
One of 21 National Register listings published here for Boone County · listed in 2007 · category: District.
Sources: the Wikipedia article · the National Register database, National Park Service