Narrabeen Lagoon is a large coastal lagoon located in Narrabeen, a suburb of Sydney, Australia. It spans approximately 1.5 kilometers in length and is surrounded by a variety of natural habitats, including wetlands and bushland. The lagoon is a popular spot for recreational activities such as kayaking, fishing, and birdwatching. The lagoon is also an important ecological site, supporting diverse wildlife and plant species. It is connected to the Pacific Ocean through a narrow channel, which helps maintain its water quality. The surrounding area features walking and cycling paths, making it accessible for both locals and visitors.