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The Lake Hopatcong Historical Museum, located in Hopatcong State Park, offers visitors a glimpse into the past of New Jersey's largest lake and its impact on the local area. Housed in a restored 19th-century building, the museum features a variety of exhibits that cover the lake's transformation from a summer resort destination to a year-round community. Artifacts, photographs, and documents on display tell the stories of the lake's famous visitors, historic steamboats, and the amusement park that once graced its shores. The museum also highlights the area's natural history and the indigenous Lenape people. With a focus on education and preservation, the museum serves as a resource for both locals and visitors interested in the cultural and environmental heritage of Lake Hopatcong.