Best lakes in Heiliges Meer-Heupen are primarily sinkhole lakes, a unique geological formation in North Rhine-Westphalia, Germany. The region is known for its diverse ecosystems, including heathland, fens, and riparian forests, supporting a variety of flora and fauna. The Großes Heiliges Meer is the largest natural still body of water in North Rhine-Westphalia and a central feature of the reserve. These lakes offer opportunities for nature observation and tranquil walks.
Last updated: May 27, 2026
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Popular around Heiliges Meer-Heupen
To the east of the Great Holy Sea is the Small Holy Sea, which is privately owned but also protected. To the southwest are the sinkhole lake and the Heideweiher pond. The sinkhole lake was formed on April 14, 1913, during the last major sinkhole in the protected area.
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A break hut with TV broadcast – I’ve never seen anything like that before.
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Beautiful lake. Unfortunately, the lake is fenced off.
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There are great cycling and hiking trails here
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Holy Sea Nature Reserve
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The lakes in Heiliges Meer-Heupen are primarily 'erdfallsee' or sinkhole lakes, formed by the collapse of underground salt pans. This unique geological formation makes them fascinating natural wonders, with the Great Holy Lake being the largest natural still body of water in North Rhine-Westphalia.
The Heiliges Meer-Heupen nature reserve boasts rich biodiversity across diverse ecosystems, including heathland, open sand areas, fens, and riparian forests. You can observe a wide array of flora and fauna. For instance, the Heathland at the Heiliges Meer offers opportunities to see mouflon herds and unique plant life.
Yes, there are well-maintained circular walking paths, especially around the Great Holy Lake. Many visitors enjoy the tranquil beauty and nature observation. For more detailed routes, you can explore the Easy hikes in Heiliges Meer-Heupen guide, which includes trails like the 'Heathland at the Heiliges Meer – Great Holy Lake loop'.
Yes, several areas are family-friendly. The Heathland at the Heiliges Meer and the Sinkhole Lake are noted for being suitable for families. There are also easy hiking routes available, such as those found in the Easy hikes in Heiliges Meer-Heupen guide, which are manageable for children.
The nature reserve is a year-round destination, with each season offering different charms. Spring and summer are ideal for observing vibrant flora and fauna, while autumn brings a spectacular display of colors. Even in winter, the landscape holds a special atmosphere, though some paths might be muddy after rain or snow.
Yes, the region is defined by its sinkhole lakes. The Sinkhole Lake, for example, was formed by a landslide in 1913, where the earth collapsed and the resulting hole filled with water. The LWL-Museum of Natural History also operates an education and research center within the reserve, highlighting its ecological and geological importance.
Yes, you can find spots to relax. The Rest shelter at Heiliges Meer offers a place to unwind and sometimes provides informational leaflets about the area. It's a good spot to take a break during your walk.
Beyond hiking, the area offers opportunities for running and gravel biking. You can find various routes in the Running Trails in Heiliges Meer-Heupen guide or the Gravel biking in Heiliges Meer-Heupen guide. These guides feature routes of varying distances and difficulties.
Visitors consistently praise the tranquil beauty and the opportunity for quiet contemplation. The unique landscape, especially the heathland and the ancient Great Holy Lake, is highly appreciated. Many enjoy observing nature and the peaceful atmosphere, particularly in the evening hours when the light casts a special glow.
Absolutely. Besides the sinkhole lakes themselves, keep an eye out for the heathland areas, such as the Heathland at the Heiliges Meer, which features an enchanted landscape with ponds and unique flora. The Heath pond at Heiliges Meer is also known for its rare plant species.
While generally well-maintained, some trails, particularly the circular route around the Great Holy Lake, can become quite muddy in winter months or after significant rainfall. It's advisable to wear appropriate footwear, and a second pair of shoes for the car might be helpful.


Still not found your perfect lake in Heiliges Meer-Heupen? Check out the guides of these regions to see even more beautiful places.