Located in downtown Billings, Montana, en route to Billings-Logan International Airport from Yellowstone, the Yellowstone Art Museum is a requisite stop for art enthusiasts. Housed in the former Yellowstone County Prison, the museum features contemporary and historic art of the Rocky Mountain West. Hours vary. 401 N. 27th St., Billings. Phone 406-256-6804. http://yellowstone.artmuseum.org.