My 28 year old son and I spent three days in Denver exploring the city and hiking Roxborough State Park as well as Red Rocks Park.
We went to a Rockies game and the Blue Moon Brewery, as well as the two hour free walking tour of the city.
One of the highlights was the two hour Denver Graffiti Walking Tour. The guide was knowledgeable and friendly, leading us to wonderful places to see outdoor, brightly colored wall art that took our breath away. She spoke about the artists, the messages within their incredible creations, and the history of graffiti art in Denver: the resistance it faced from the political establishment, and how it finally secured a foothold and then a following.
We loved it and highly recommend this fascinating, uplifting experience.