Highland Park in Rochester, New York, is a 150-acre arboretum and public park shaped from a glacial moraine and designed to retain a natural appearance in Frederick Law Olmsted’s landscape style. Founded in 1888 through a 20-acre gift from nurserymen George Ellwanger and Patrick Barry, it became one of the nation’s first municipal arboretums. Its fame grew from the lilac collection established in 1892 by horticulturist John Dunbar, and lilacs remain its signature feature. The park also includes extensive ornamental plantings, gardens, memorials, cultural venues, and landmarks such as Warner Castle and the Lamberton Conservatory, and it is widely known for Rochester’s annual Lilac Festival.