As part of the dam construction, fill was added between the Longfellow Bridge and Charlesgate and dedicated as the Boston Embankment, now universally known as the Esplanade.

Though entirely designed—and in that sense artificial—the Basin is also a wildlife habitat for hundreds of animal and plant species that play a role in the ecology of the region and enrich the experience of urban park users.

Water quality in the once heavily polluted Basin has improved dramatically in recent years, creating better habitat for wildlife and attracting people back to the river.

[6] The 5-acre (2.0 ha) John F. Kennedy Park located near Harvard Square is landscaped with plants that bloom at the time of the President's May birthday and a memorial fountain.

The park, designed by Carol R. Johnson Associates of Boston, uses materials indigenous to New England including native trees, and the granite fountain and the entrance pillars are inscribed with quotations from the President's speeches.

[8][9] The reservation's multiple recreational opportunities include cycling on the Charles River Bike Paths, motorized and non-motorized boating, playgrounds, picnicking, swimming pools, tennis courts, ice skating, and concerts at the Hatch Memorial Shell.

[3] Sailboat rentals are offered through the non-profit Community Boating, Inc.[10] A quarter mile (400 meter) Braille trail is located in Watertown, near the foot of Irving Street.