It’s off the tourist-beaten path, it’s relatively new to the National Parks system, and it’s not highly developed.
All of which means you can have a fantastic, unhurried adventure among ruins of ancient Americans, without the crowds.
We found it almost accidentally, driving by on our way to Abiquiue, New Mexico. Film from CRIA (Chimney Rock Interpretive Association?) recently dropped into my in-box.
I tried to get the definitive photo of a rufous hummingbird male who was trying to keep a dozen other hummers of three different species away from a battery of hummingbird feeders, but he was too fast.
Chimney Rock is a good example of the vast number of ruins from Puebloan Indian tribes and tribes even more ancient, found across the desert Southwest, mostly unprotected, uncatalogued, and unknown to any but local people who hunt pots, mostly illegally. As a nation, we should fund better preservation and more study of these human habitations.
Another short video:
Note there is at least one other formation in southern Colorado called Chimney Rock, and another formation in North Carolina that is probably more famous.

A view of the kiva and other ruins atop the small mesa formation of Chimney Rock N.P. USDA photo via OutThere Colorado.
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