Colorado - Constructed - 1880–1889
| 19th Street Bridge |
| Alamo Hotel |
| Brinker Collegiate Institute |
| Bryan Hose House |
| Bunce School |
| Byers-Evans House |
| Central High School |
| Church of the Brethren |
| City Park |
| Clements Rowhouse |
| Como School |
| Corbin, E.W., House |
| Crestone School |
| Denver Athletic Club |
| Denver City Cable Railway Building |
| Denver Public Library |
| Duke, Nathaniel W., House |
| Edgerton House |
| Evans, J.G., Barn |
| Fetz-Keller Ranch Headquarters |
| First Congregational Church |
| Fisher-Zugelder House and Smith Cottage |
| Flower-Vaile House |
| Fort Logan National Cemetery |
| Fort Lyon National Cemetery |
| Hallett, Samuel I., House |
| Holy Cross Abbey |
| Hose House No. 2 |
| Jacobs Building |
| Jaffa Opera House |
| Leadville National Fish Hatchery |
| Limon Railroad Depot |
| Masonic Temple Building |
| Maxwell Park School |
| Midway House |
| Miller House |
| Montezuma Schoolhouse |
| Morley Bridge |
| Palmer-Ferril House |
| Poncha Springs Schoolhouse |
| Richthofen Castle |
| Rock Creek Stage Station |
| Romeo Block |
| Root, Amos H., Building |
| St. Joseph's Roman Catholic Church of Denver |
| Trinity United Methodist Church |
| Union Station |
| Ute Cemetery |
| Wheeler Opera House |
| Wheeler-Stallard House |
| Zeitz Buckhorn Exchange |
Data from United States Park Service and Wikidata
