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Photo: Peter K., CC BY-SA 3.0 via Wikimedia Commons
This one is definitely serious, incorporating a surprisingly good art collection for a small town, with works by Georgia O'Keeffe and Peter Hurd, among others. There is a wing devoted to space flight and rocket science (but not UFOs!) that includes the Robert H. Goddard Planetarium, named in honor of the rocketry pioneer who did much of his research in Roswell.
The Roswell Museum was founded in 1936 and is located in Roswell, New Mexico, United States. The museum features exhibits about the art and history of the American Southwest, as well as the Robert H. Goddard laboratory.
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Devoted to the local cult activity; you can decide for yourself whether it's serious or not.
A state park with swimming, fishing, and hiking. The lakes are very deep with nearly vertical cliffs surrounding them.