If romance is on the agenda, head up into the hills to the Flagstaff House for a dining experience like no other. Built in 1929 as a retreat cabin, the spot resides on the side of Flagstaff Mountain, overlooking Boulder and the surrounding foothills. The dining area is the epitome of sophistication and mountain elegance, highlighted by a greenhouse-like glass dining pavilion that provides stunning views. The main courses include offerings such as grilled Alaskan King Salmon and Buffalo Filet Mignon. Its wine cellar hives over 20,000 bottles.