Lava Beds National Monument was created on 1925-11-21.
Lava Beds National Monument is located in northeastern California near the town of Tulelake. It is situated in the southern part of the Cascade Range and is known for its rugged lava landscape, lava tube caves, and Native American rock art sites.
Why? Because they like it there and that is more of an opinion
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Yes, there are caves in Death Valley, primarily formed by volcanic activity and erosion. Notable examples include the Golden Canyon and the Mosaic Canyon, which feature interesting rock formations and geological features. Additionally, there are lava tubes, such as those found in the nearby Lava Beds National Monument. However, many of these caves are not extensively explored or developed for tourism.
It is located in California. It is a national monument. It's lava flow remains in 60-ft. (18-m) columns.
Craters of the Moon National Monument is located in central Idaho, USA. It is situated roughly 18 miles southwest of Arco and 24 miles northwest of Carey. The monument features vast lava fields, cinder cones, and unique geological formations.
magma from hot spots in the crust
Devils Postpile is primarily composed of basalt, a dense volcanic rock formed from the rapid cooling of lava. The unique columnar jointing seen in the formation occurs as the lava cools and contracts, creating striking hexagonal columns. This natural monument is located in California and is part of the Devils Postpile National Monument, showcasing the beauty of geological processes.
There is a national monument and national preserve located in Idaho that is called The Craters of the Moon. The name is a poetical reference to the desolation of the substantial lava fields in the park. It has nothing to do with the actual moon or its craters.
Beth Slocum has written: 'Lava cast recreation area for the Mount St Helens National Volcanic Monument, Gifford Pinchot National Forest' -- subject(s): Trails, Recreational use, Designs and plans
Sites in Hawai'i managed by the National Parks Service: Haleakala NP Hawai'i Volcanoes NP Kalaupapa NHP Kalako-Honokohau NHP Pu'ukohola Heiau NHP World War Two Valor in the Pacific NM Ala Kahakai Nat Hist Trail