Established in 1872.
The Arnold Arboretum of Harvard University discovers and disseminates knowledge of the plant kingdom to foster greater understanding, appreciation, and stewardship of Earth’s botanical diversity and its essential value to humankind. Established in 1872 and planned and designed in collaboration with Frederick Law Olmsted, the Arnold Arboretum is a National Historic Landmark and one of the best preserved of Olmsted’s landscapes. Founded as a public-private partnership between the City of Boston and Harvard University, the Arnold Arboretum is a unique blend of respected research institution and beloved public park in Boston’s Emerald Necklace. The Arboretum’s living collection of trees, shrubs, and woody vines is recognized as one of the most comprehensive and best documented of its kind in the world. Free and open to the public every day of the year, the Arboretum is a safe and accessible community resource that is utilized by thousands of visitors each year.
Yes, you can. The gates throughout the Arboretum are open to pedestrians at all times. There are porta-potties in a few locations throughout the grounds. The closest one to the visitor center is in the vicinity of the bonsai house.
No. It's not allowed to protect the wildlife.