The Arnold Arboretum is a 281-acre park located in Boston, Massachusetts. It is part of the Emerald Necklace, a chain of parks designed by landscape architect Frederick Law Olmsted. The arboretum is renowned for its extensive collection of trees, shrubs, and plants, featuring over 15,000 individual specimens from around the world. Established in 1872, the Arnold Arboretum is managed by Harvard University and serves as a center for research and education in plant science. Visitors can explore its scenic landscapes, walking paths, and seasonal displays, making it a popular destination for nature lovers and researchers alike.