 517 Diner in Thief River Falls, the newest, most trendy diner in town. Come for the classic breakfast or lunch items. Find something on their drink menu, too. Run through the drive-thru or sit back in the cozy lobby. At 517 Diner, you can choose from creamy milk tea, energizing coffee, hydrating hydrolite, or fruity smoothie. Try flavors like Thai, coconut, mango, pineapple, honeydew, or papaya, or crystal bubble lineup.