Odaiba Marine Park is the main waterfront open space in Odaiba, with a boardwalk, bay views, and one of mainland Tokyo's few beaches. Swimming is not recommended, but the beach and promenade are popular for photos, sunset walks, and views back toward the city.
The park also has Odaiba's replica Statue of Liberty and access to Dai-San Daiba, the preserved No. 3 Battery. It is an easy stop between Odaiba's malls, museums, and waterfront stations.