Velký rybník, Nature reserve in Rybniště, Czech Republic.

Velký rybník is a 35.8-hectare pond, the largest standing water body in the Děčín district, lying at 449 m on the upper Lužnička stream 1.5 km northeast of Rybniště. Its 280-metre dam, up to 4.3 m high, is reached from the village of Ladečka; the surrounding reserve covers 103.72 ha of reed beds, wet meadows and alder carr.

The reserve was formally designated as a protected area in 1984 with the goal of preserving the region's ecological value. This designation reflected a commitment to safeguard the natural resources and habitats present in this landscape.

The German name Bernsdorfer Teich and the 1571 map label Pelmensdorffer Teich recall the villages that once stood nearby. Ice was cut from the pond in warm winters, with documented harvests in 1884 and 1898 for towns on both the Czech and Saxon sides. A nature trail now links the pond with the nearby Světlík pond.

Access to the dam is from the village of Ladečka, part of Horní Podluží; the pond itself lies 1.5 km northeast of Rybniště. Swimming is prohibited because the protected bird area is used by migrating birds. A nature trail links the pond with the nearby Světlík pond.

The site serves as a crucial stopover point for migrating birds traveling between northern and southern Europe, especially during spring and autumn. At these times, visitors may observe species that rarely appear in the region at other times of the year.