Beaver Brook Reservation is a 303-acre public recreation area on the Belmont-Waltham line in Massachusetts that blends natural habitat with recreational amenities such as a bike path, playing fields, fishing areas, and a wading pool. Established in 1893 as the first reservation of the Metropolitan Park Commission, it was created specifically to protect the Waverly Oaks, 22 white oak trees preserved through the efforts of landscape architect Charles Eliot. Though the last tree died in the 1920s, the site remains important to the park’s identity. The reservation also preserves a 19th-century home and the remains of a fulling mill, connecting today’s park to earlier landscape design, waterpower, and small industry.