Velence and Dinnyés Nature Conservation Area, The southern part of the protected area registered as Dinnyés and Velence in the list of wetlands of international importance.

The Velence and Dinnyés Nature Conservation Area is a protected wetland in Fejér County, Hungary, encompassing two lakes and marshy areas. The landscape consists of shallow lakes, reed beds, open water, and grasslands that support insects, fish, amphibians, and numerous plant species.

The marsh was declared protected in 1966, and the site later joined the Ramsar list as part of the Dinnyés and Velence wetland. Before the main road, the 6213 road and the Budapest–Murakeresztúr railway were built, this marshy ground was connected to Lake Velence; today only the Dinnyés–Kajtori canal links the two. In 1979 researchers began studying the area's fungi and found several species new to Hungary, including the marsh snake mushroom.

The area reflects traditional ways of life, with locals harvesting reeds and grazing animals in the meadows. These practices remain part of the region's identity and connect nature with everyday community activities.

Visitors can use observation towers to watch birds without disturbing wildlife, and follow walking paths through the wetlands to explore the area. It is important to follow protection rules and keep the area quiet and clean to help preserve the habitats.

The lake was once a single connected body of water that later separated into two distinct lakes, with one evolving into extensive reed beds. This natural transformation created different habitats that support different species and makes the area particularly varied for visitors to explore.