
The Keystone Hotel was built in 1901 out of Rhyolite. It sits on the corner of 4th and Wilcox Streets in Castle Rock, and is now the home of the Castle Cafe. Douglas County History Research Center #1996.053 |

When it was completed, Cheesman Dam was the tallest dam in the world. Ttaller than any structure in Denver. The structure was built of granite quarried from the nearby mountains. Photo courtesy of Denver Water Board. |

Theodore Roosevelt may have come through Douglas County on a "whistle stop" tour of the west in 1905. Douglas County History Research Center #1998.058.006. |

Douglas County High School graduated 16 students in 1911. Douglas County History Research Center #678.105 |

The Douglas County High School was rebuilt on Wilcox Street after a disastrous fire that destroyed the earlier brick building. Photo courtesy William Kirby, Douglas County History Research Center. |

The oldest part of the Highlands Ranch Mansion was built in 1891. The mansion was expanded to double its size before 1925. Photo by Mile Hi Photo, American Memory Project. Library of Congress. |

The Parker Consolidated School was formed by the closing of the Pine Grove, Plainfield and Allison Schools. Douglas County History Research Center #666.02 |