The Natural History Museum of Los Angeles County is a massive museum in California with collections spanning 4.5 billion years of history. It's got nearly 35 million specimens and artifacts, making it the largest natural and historical museum in the western U.S. Visitors can check out exhibits on everything from dinosaurs to urban wildlife in Southern California. Plus, they host cool special exhibitions like mummies and pterosaurs. And don't miss the butterfly pavilion in the spring and summer or the spider pavilion in the fall – it's a bug lover's dream!