At the northeast tip of the Bronx is an ear-shaped peninsula framed in the back by The Lagoon, a body of water separating the peninsula from the park’s larger section.
It is a quiet and shallow waterway on the city’s periphery, as natural as it gets in a densely urbanized borough. Its shape is manmade as it once separated islands from the mainland prior to becoming part of the largest land reclamation project in the Bronx.
Hidden Waters blog 