This circa 1871 residence is one of Boulder’s few surviving examples of early vernacular architecture.

The 1963 Martha Weiser House is an outstanding example of an architect-designed modern Contemporary residence in Boulder County.  Martha "Ricky" Weiser, a local environmental activist and actress, and her husband commissioned family friend and local master architect L. Gale Abels (1927-1995) to design the house among the sandstone outcroppings of what is now the White Rocks State Natural Area in rural Boulder County, around eight miles northeast of the City of Boulder. 

Established in 1869, when considered as a whole, the cultural manifestations and the land represent a chapter in the history of the settlement and expansion of Boulder County and the eastern foothills of the Rocky Mountains.

Built in 1903 by the Baldwin Locomotive Works of Philadelphia, Engine No. 463 is one of only two remaining locomotives of the K-27 series originally built for and operated by the Denver & Rio Grande Western Railroad. 

The church was constructed in circa 1881, in what was the Swedish settlement of Ryssby. 

Built in 1865, using native field and river stone, the three-story structure includes additions of wood.

Excavations at this sealed, multi-component prehistoric site indicated that the cultural deposits remain intact and essentially undisturbed except where exposed by erosion. 

D&RGW Locomotive No. 168 was constructed by the Baldwin Locomotive Works in 1883.  It pulled trains within the D&RG narrow gauge system from 1883 until 1933, when it was retired and nearly scrapped.

This small 1908 brick industrial building, composed of a one-story base and a two-story tower, illustrates early power generation systems in Boulder.

The district is comprised of twelve buildings which form the oldest part of the main campus of the University of Colorado.