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Polders

A unique landscape of high and low, dry and wet

In the centuries-old polder area of Grenspark Kalmthoutse Heide, iron-rich seepage water flows from the slope of Brabantse Wal, giving rise to rare plant growth.

At the foot of the Brabant Wall lies an old polder area on the transition from low clay grounds to high sandy grounds. Diking started here as early as the 12th century, with the aim of draining the low polder land. Many more floods followed and it was only at the end of the 17th century that the dikes won from the water and the polder landscape slowly took on its current shape. The transitions - between high and low, dry and wet, sand and clay - make it a unique landscape. Nice to know: there are still many medieval ditches here, surrounded by pollard willows and reeds.

 

MTB News from the park

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  • 16 October 2025

Dig & Ride Event - Saturday 29 November

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  • 28 May 2025

Successful edition of the MTB Dig & Ride Event

  • 22 April 2025

MTB Klusdag: 17 May

  • 13 January 2025

MTB route innovations

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MONA News from the park

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  • 6 November 2025

European MONA meeting on sustainable mobility and recreation in Grenspark Kalmthoutse Heide

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  • 24 June 2025

Grenspark Kalmthoutse Heide launches interactive digital map

  • 28 January 2025

Interview with Mattias Van den Bergh, project leader Sustainable mobility and recreation

  • 1 August 2024

Fill out our resident survey and contribute to a sustainable future for Grenspark Kalmthoutse Heide!

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Flora and fauna

Many seepage-rich areas in this area now serve as agricultural polders. Nature conservation organisations are trying to get ownership of these, with the aim of transforming them into seepage-rich nature polders with flower-rich grasslands and marshes. In that case, you will see water violet, water mint, hollyhock, yellow morning star, marsh marigold, large burnet and true cuckoo.

For many birds, the wet polders are a paradise. Here you can spot birds like bluethroat, skylark, reed warbler, stonechat, stonechat, shelduck, marsh harrier and partridge. In winter, you often find reed geese, barnacle geese and greylag geese here. In ditches and pools you might see the small newt scurrying away. And the lucky ones may even see roe deer here!

More about:

  • Nature and landscapes
  • Heide
  • Forests
  • Fens
  • Dunes
  • Meadows
 
Featured: Day of Silence
27 October 2019

On 27 October 2019, we will once again organise a 'Day of Silence'! On that day, 'time is set back'. Time also for enjoying, exploring and experiencing nature within the beautiful Grenspark Kalmthoutse Heide!

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#grensparkkalmthoutseheide

To see special images from the park, follow @grensparkkalmthoutseheide

๐—ข๐—ป๐˜๐—ฑ๐—ฒ๐—ธ ๐—ฑ๐—ฒ ๐—ฝ๐—ผ๐—ผ๐—ฟ๐˜๐—ฒ๐—ป ๐˜ƒ๐—ฎ๐—ป ๐—ต๐—ฒ๐˜ ๐—š๐—ฟ๐—ฒ๐—ป๐˜€๐—ฝ๐—ฎ๐—ฟ๐—ธ: ๐—›๐—ฒ๐—บ๐—ฒ๐—น๐—ฟ๐—ถ๐—ท๐—ธ On...
๐—š๐—ฒ๐˜‡๐—ผ๐—ฐ๐—ต๐˜: ๐—๐˜‚๐—ป๐—ถ๐—ผ๐—ฟ ๐—ฅ๐—ฎ๐—ป๐—ด๐—ฒ๐—ฟ ๐—ธ๐—ฎ๐—บ๐—ฝ๐—ฏ๐—ฒ๐—ด๐—ฒ๐—น๐—ฒ๐—ถ๐—ฑ๐—ฒ๐—ฟ๐˜€ (๐Ÿญ๐Ÿณโ€“๐Ÿฎ๐Ÿญ ๐—ฎ๐˜‚๐—ด๐˜‚โ€ฆ
From 28 February to 8 March, we celebrate the we...
๐—ช๐—ฎ๐—ป๐—ฑ๐—ฒ๐—น๐—ถ๐—ป๐—ด ๐—บ๐—ฒ๐˜ ๐—ด๐—ถ๐—ฑ๐˜€: ๐—ฑ๐—ฒ ๐—ป๐—ฎ๐˜๐˜‚๐˜‚๐—ฟ ๐—ถ๐—ป ๐—š๐—ฟ๐—ฒ๐—ป๐˜€๐—ฝ๐—ฎ๐—ฟ๐—ธ ๐—ž๐—ฎ๐—น๐—บ๐˜๐—ต๐—ผโ€ฆ
๐ŸŽ™๏ธ ๐—ฃ๐—ผ๐—ฑ๐—ฐ๐—ฎ๐˜€๐˜ ๐—บ๐—ฒ๐˜ ๐—ฑ๐—ฒ ๐—š๐—ฟ๐—ฒ๐—ป๐˜€๐—ฝ๐—ฎ๐—ฟ๐—ธ ๐—๐˜‚๐—ป๐—ถ๐—ผ๐—ฟ ๐—ฅ๐—ฎ๐—ป๐—ด๐—ฒ๐—ฟ๐˜€ ๐˜€๐˜๐—ฎ๐—ฎ๐˜ ๐—ผโ€ฆ
Enjoy our nature reserve, contribute now and then and build your good karma in the meantime. Become a Grenspark volunteer! Together we maintain our precious nature.

Become a Grenspark volunteer!

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ยฉ Grenspark Kalmthoutse Heide | Privacy - Disclaimer

Thanks to (nature) photographers Marc Slootmaekers, Fred Severin, Dick van Dop and Rudi Delvaux for making their photos available.

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