The Loomis Museum, also known as the Loomis Visitor Center, the Manzanita Lake Visitor Center and the Manzanita Lake Museum, was built by Benjamin Franklin Loomis in 1927 near Manzanita Lake, just outside Lassen Volcanic National Park in California, USA. Loomis was a local homesteader and photographer who documented the 1915 eruptions of Lassen Peak, and was instrumental in the 1916 establishment of the national park.