Moczydło 1, also known as Oczko Wodne Moczydło No. 1, is a pond located in the Ursynów district of Warsaw, near the Kabacki Forest. It is part of three water bodies on the Moczydło estate, forming the so-called Ponds on Moczydle. It has an area of 0.3810 ha and a volume of 4202 m³. The reservoir is of natural glacial origin and lies in a valley depression. Water from the pond is drained through the M ditch, which is part of the Grabowski Canal ditch system. In 2008, the pond underwent renovation, as a result of which its depth was increased to 1.8 m. There is a rich ecosystem in the vicinity of the pond, including fish such as roach, tench, perch and pike, as well as numerous species of birds and amphibians, including protected frogs and newts. The pond is protected as part of the Kabacki Forest nature reserve and the Warsaw Protected Landscape Area. In addition, in 2020, a project was launched to protect endangered species associated with aquatic habitats, including the renaturalization of the pond banks.