"Denver's last operating trolley, Car No. 25, is available for rides during the summer season. Originally built in 1911, it is the last remaining fully intact car out of the 250 that once served the Denver region. Passengers can board the trolley at Confluence Park and make stops at the Downtown Aquarium and the Children's Museum of Denver, following the former historic Route 84 along the South Platte River. The trolley operates on weekends, with round-trip rides lasting about 25 minutes." - Travel + Leisure Editors