The Colorado Midland Railroad constructed the stone fourteen-stall roundhouse in 1889 for the maintenance of its steam locomotives. 

Built in 1902 for Clark Mellen, the one-story Terrace style building helped meet the housing needs of working families.

Built in 1903, the style building, designed by the architectural firm of Douglas and Hetherington, is notable for its Colorado Springs red sandstone construction.  It was the college’s third dormitory for women and reflects the increasing number of female students at the college during the early 20th century. 

Major Henry McAllister, close associate of William J. Palmer, hired Philadelphia architect George Sommers to design and build this large red brick residence during 1873-1874.  The property is open to the public as a museum.

Described as a “tidy form-meets-function design” and a “little masterpiece of local modernity,” the building, designed by local architects Dietz Lusk and James Wallace, is an important example of Modernism in Colorado Springs.  The building is distinguished by its folded plate roof, cantilevered walls of glazed turquoise brick, and an integral exterior courtyard.  

The result of an ambitious ten-year community school building program, this impressive 1891 structure, with its 1902 addition, employs an unusual expression of the Romanesque Revival style.

The Los Angeles Railway (LARy) No.3101's Presidential Conference Committee (PCC) car design represents a major engineering development in rail-based surface street transportation.

The 1892 Lindley-Johnson-Vanderhoof House is significant for its architecture as an excellent example of the Queen Anne style in Colorado Springs executed in stone and brick, as reflected in its steeply pitched gables, asymmetrical façade, use of multiple materials, circular tower and semi-decagonal bay, one-story porch extending into a terrace, and porte cochère. 

Constructed in 1900 for a prominent businessman, the house became part of the Colorado College campus in 1936.  It is associated with the development of north Colorado Springs and subsequently played a significant role in the college’s history, serving as the Student Union from 1937 to 1959. 

The 1928 Knights of Columbus Hall was the site of numerous social and entertainment activities in Colorado Springs, including fraternal organization meetings and social gatherings, and public assemblies, particularly for young people and high school students.  In 1937 it became the first home of the Pioneer Museum, now known as the Colorado Springs Pioneers Museum.