Lake Burgas, Ramsar wetland site in Burgas, Bulgaria.

Lake Burgas is a shallow coastal liman west of Burgas, separated from the Black Sea by the Kumluka sand spit and linked to it by a narrow channel. It is 9.6 km long, 2.5 to 5 km wide, covers 28 km2 and reaches only 1.3 m in depth. Its bed is clayey silt, and reed and cattail belts line the western and northwestern shores.

The lake has historically supported local fisheries for centuries, but environmental impacts from a nearby petrochemical plant established in the mid-20th century led to a decline in fish production and water quality.

Lake Burgas serves as an important site for birdwatching and ecological research, attracting nature enthusiasts who observe over 250 bird species, including 61 endangered species listed in Bulgaria's Red Data Book.

Visitors can access the lake from Burgas city center using local transportation, with optimal birdwatching opportunities occurring during spring and autumn migration seasons when thousands of waterbirds gather in the wetlands.

The lake is home to rare species such as the white-headed duck and red-breasted goose, and its brackish waters with salinity levels between 4 and 11 parts per thousand support 23 different fish species.