Best natural monuments around Wołomin offer diverse natural landscapes, from river valleys and peat bogs to glacial erratics and forest reserves. The region, situated within the Mazowieckie Voivodeship, features unique ecosystems and geological formations. These sites are recognized for their ecological, scientific, and landscape value, providing opportunities to explore varied terrain. Visitors can experience a range of natural environments, including wetlands, ancient forests, and post-glacial landforms.
Last updated: May 17, 2026
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The forest reserve was established by the ordinance of the Minister of Environmental Protection, Natural Resources and Forestry of December 31, 1993, on an area of 160.56 ha. It was created thanks to the efforts of prof. Witold Rosa, head of the Forest Management Department at SGGW in the years 1977-1985. It is located on the south-eastern edge of the Nieporęt commune, in the fork of the Marki-Nieporęt and Marki-Legionowo roads, on the Czarna river. The name refers to the historical forest in the vicinity of Słupno, which was heavily thinned by logging and peat exploitation. The reserve is dominated by riparian forest, alder swamps, oak-hornbeam forests, and mixed coniferous forests. 80% of the tree stand is alder and birch. Rez. “Puszcza Słupecka” is one of the most valuable forest areas in Mazovia. Many rare protected plant species occur here, including the mezereon (Daphne mezereum) – a highly poisonous plant whose fruits can cause human death if ingested. In the reserve, golden orioles, black storks, and cranes nest, and moose, roe deer, wild boars, raccoon dogs, and foxes occur, as well as the adder among reptiles.
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The Horowe Bagno Nature Reserve, established in 1988, covers approximately 44 hectares and protects peat bogs, marsh forests, and habitats of rare plant and animal species. It is divided by a highway, with the S8 expressway nearby.
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Horowe Bagno – a peat bog nature reserve near Warsaw. Its administrative area is located within the town of Marki. The conservation goal is to preserve a diverse area of moist forests, peat bogs, and waters with numerous rare and protected plant species, serving as a refuge and breeding ground for numerous animal species. The shore is accessible by car, and many beautiful animal species, primarily birds, can be found there. https://pl.wikipedia.org/wiki/Rezerwat_przyrody_Horowe_Bagno
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August 2025 - the river is not flowing, you can cross it with dry feet
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There is another place to cross the river than the ford. About 50 m upstream there are footbridges, or the aforementioned Kaliń bridges.
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a lot of water has disappeared, it's getting smaller
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on the border of Marki and Zielonka
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Generally it's hard to get there to see anything..., we finally managed to find a window, but we paid for it with wounds and bushes :-)
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The Wołomin region offers a diverse range of natural features. You can explore marshy terrain and low dunes covered with pine forests at Mosty Kalińskie Nature Reserve, or tranquil peat bogs and moist forests at Horowe Bagno. The region also features unique geological formations like the post-glacial dunes and sand fields within the Natura 2000 Area Rembertów Training Ground PLH140034, and a significant Glacial Erratic Natural Monument in Wołomin.
The natural monuments in Wołomin are rich in biodiversity. At Mosty Kalińskie Nature Reserve, you might spot rare plant species, amphibians, reptiles, butterflies, and dragonflies. Horowe Bagno is a refuge and breeding ground for numerous animal species, making it ideal for birdwatching. Puszcza Słupecka Nature Reserve provides habitat for diverse birds like orioles, black storks, and cranes, as well as mammals such as moose, deer, wild boars, raccoons, and foxes.
Yes, the region features notable geological natural monuments. The Glacial Erratic Natural Monument in Wołomin is a large granite boulder, approximately 2 billion years old, brought to the area by the Warta glaciation. Additionally, the Natura 2000 Area Rembertów Training Ground PLH140034 showcases interesting post-glacial landscapes with Holocene parabolic dunes and wind-blown sand fields.
The Wołomin area is home to several peat bog reserves, each with unique characteristics. Horowe Bagno is known for its moist forests, peat bogs, and various water bodies, serving as a refuge for diverse flora and fauna. Śliże Nature Reserve protects two overgrowing dystrophic lakes and features a floating moss cover (pło mszarne), showcasing the secondary formation of a raised bog with protected plant species like round-leaved sundew and bog-myrtle.
Yes, the Wołomin region offers various cycling opportunities. You can find numerous routes for road cycling and general touring. For example, the "Hardened Forest Path – Asphalt Forest Path loop from Kobyłka Ossów" is an easy cycling route. Many trails run along the borders of reserves like Puszcza Słupecka, allowing you to experience the natural beauty. You can find more cycling routes in the Cycling around Wołomin guide.
There are several running trails available near the natural monuments. For instance, you can explore the "Pętla Marki - Puszcza Słupecka" or the "Puszcza Słupecka and Łęgi Czarnej Strugi Reserves Loop" for moderate runs. The "Kwadrat – Rezerwat Mosty Kalińskie loop from Zielonka" offers a more challenging option. Discover more running trails in the Running Trails around Wołomin guide.
Many natural monuments offer hiking opportunities with varied terrain. At Mosty Kalińskie Nature Reserve, you'll encounter marshy terrain and low dunes. Horowe Bagno features well-maintained trails through moist forests and peat bogs. While direct entry into Puszcza Słupecka Nature Reserve is restricted, surrounding trails allow for hiking. The Natura 2000 Area Rembertów Training Ground PLH140034 also offers varied terrain suitable for hiking, including dunes and sandy areas.
Yes, several natural monuments are suitable for families. Lake Czarne allows access to the lake shore and has an information board about local animal species. Zapadliska Pond offers sandy, coniferous roads and is easily accessible. The Glacial Erratic Natural Monument in Wołomin is also a family-friendly point of interest due to its unique geological nature.
The best time to visit depends on your interests. Spring and autumn offer pleasant temperatures for hiking and cycling, with vibrant flora and fauna. Early mornings are particularly good for wildlife spotting at places like Horowe Bagno. While some areas like Mosty Kalińskie Nature Reserve might have higher water levels in certain seasons, generally, the natural monuments are enjoyable throughout the warmer months.
Visitors appreciate the diverse natural landscapes, from river valleys and peat bogs to unique geological features. The tranquility and opportunities for outdoor activities like cycling and hiking are highly valued. Many enjoy the rich biodiversity, including rare plant species and various wildlife. The community has shared over 120 photos and given more than 250 upvotes, highlighting the beauty and appeal of these natural sites.
Horowe Bagno Nature Reserve is an excellent destination for birdwatchers. Its wetlands, moist forests, and various water bodies provide a rich habitat and breeding ground for numerous bird species, offering picturesque views and opportunities to observe local fauna in their natural environment, especially in the early morning.
Yes, the region features significant forest reserves. Puszcza Słupecka Nature Reserve protects riparian forests and oak-hornbeam forests, though direct entry is restricted to preserve its sensitive ecosystems. However, trails run along its borders, allowing visitors to experience the remnants of this historical forest. Mosty Kalińskie Nature Reserve also preserves diverse forest habitats, including rare riparian forests.


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