Charles Eliot was an American landscape architect. Known for pioneering principles of regional planning, naturalistic systems approach to landscape architecture, and laying the groundwork for conservancies across the world. Instrumental in the formation of The Trustees of Reservations, the world's first land trust, playing a central role in shaping the Boston Metropolitan Park System, designing a number of public and private landscapes, and wrote prolifically on a variety of topics.

The Trustees of Reservations is a non-profit land conservation and historic preservation organization dedicated to preserving natural and historical places in the Commonwealth of Massachusetts. It is the oldest land conservation nonprofit organization of its kind in the world and has 100,000 member households as of 2021. In addition to land stewardship, the organization is also active in conservation partnerships, community supported agriculture (CSA), environmental and conservation education, community preservation and development, and green building. The Trustees owns title to 120 properties on 27,000 acres (11,000 ha) in Massachusetts, all of which are open to the public. In addition, it holds 393 conservation restrictions to protect an additional 20,000 acres (8,100 ha). Properties include historic mansions, estates, and gardens; woodland preserves; waterfalls; mountain peaks; wetlands and riverways; coastal bluffs, beaches, and barrier islands; farmland and CSA projects; and archaeological sites.