I only had a short time at this Museum before I had to catch a flight out of Denver Airport but what I saw was very interesting. I particularly liked the renovated 1913 Trolley Trailer (Trolley #610) that used to run along Colfax Ave into Aurora. The photography exhibition that was showing in one of the museum's side rooms was also of great interest to me. The lady on the front desk was very helpful and accommodating. There is no entrance fee for this museum.