Fertö / Neusiedlersee Cultural Landscape, Cultural landscape at Lake Neusiedl, Austria and Hungary.

The Fertö / Neusiedlersee Cultural Landscape is a cross-border World Heritage Site in Austria and Hungary, covering the Neusiedler See and its shoreline. The lake is one of Europe's few steppe lakes, only a few metres deep, with an average area of 320 km², a catchment of 1,120 km², and a north-south extent of 36 km. Its western shore is bordered by the Leitha and Ödenburg hills, outliers of the Eastern Alps, and wide reed belts line the water.

People have lived and farmed around this lake since the early Iron Age, and the patterns of land use from that period are still visible in how fields, pastures, and settlements are arranged today. Noble families built estates and gardens along the shores in the 17th and 18th centuries, leaving behind manor houses and parklands that remain part of the landscape.

The name Fertő comes from the Hungarian word for the lake, while Neusiedler See is the German name used on the Austrian side. The villages are known for their whitewashed houses and wooden gates, and the wine culture is tied to the vineyards on the slopes of the Leithagebirge. The Fertőrákos quarry, used from Roman times until 1948, now hosts theatre performances in its cave theatre from June to September.

The area is best explored by bicycle, as a well-marked network of paths connects villages, viewpoints, and nature spots on both sides of the border. Visitors should plan for open, sun-exposed terrain with little shade, so carrying water and sun protection is practical at any time of year.

The lake has no natural outlet, meaning the water level depends entirely on rainfall and evaporation rather than flowing out to a river. In very dry years, the lake can shrink enough that people walk across stretches of the lakebed, which sits only a few inches (centimeters) deep in places.