Janovský mokřad, Nature reserve near Nýřany, Czech Republic

Janovský mokřad is a wetland reserve near Nýřany covering approximately 71 hectares, featuring water bodies, streams, and diverse habitat types. The landscape developed through natural water accumulation and the engineering work of beavers, which have significantly shaped the terrain.

The name Janov comes from a 130-hectare pond and a village founded in the 14th century, possibly by Chotěšov provost Jan. The village on the pond's northeast shore, with a fortress standing until around 1600, disappeared in the 15th century. The pond was drained in 1874 and a farmstead built below its dam; the D5 motorway later split the former pond bed. The reserve was declared with effect from 26 June 2021.

The name Janov comes from a 130-hectare pond and a village founded in the 14th century, possibly by Chotěšov provost Jan. The village stood on the pond's northeast shore and vanished, probably in the 15th century; its fortress lasted until around 1600. A gamekeeper's lodge and a mill stood below the pond dam in the 18th century.

The reserve has marked paths that guide visitors through the area safely. Sturdy footwear is recommended, and it is important to keep distance from water birds and respect their habitats.

The reserve's name recalls a vanished village and a 130-hectare pond drained in 1874; the D5 motorway now cuts across the former pond bed. A canal dug in the late 19th century still feeds Luční potok with the same flows the pond once maintained. Beaver dams on that stream raise water levels for amphibians and insects.