Poppelmondedal

In the heart of the Mount Saint Peter Nature Reserve lies the Popelmondedal, a unique dry valley with limestone grasslands, flower-filled slopes and a striking abundance of plants and butterflies. For nature lovers, this is one of the most beautiful places to discover the unique flora and fauna of the Mount Saint Peter.

A landscape full of contrasts
The Popelmonde Valley is what is known as a ‘dry valley’: a valley once formed by flowing water, but through which no stream now runs. The upper part, the Zandhoek, has poor, nutrient-deficient soil where mainly herbs grow. Further down the valley, however, the soil is rich in limestone. These differences mean that a remarkably large number of unusual plants can be found here, including orchids, wild marjoram, rock thyme and the rare limestone chickweed.

The Devil’s Cave is also situated on the edge of the Popelmonde Valley and is one of the most striking features of this varied landscape.

A paradise for butterflies
The flower-filled slopes attract large numbers of insects, making the Popelmonde Valley an excellent place to spot rare butterflies. With a bit of luck, you might spot species such as the swallowtail or the strikingly coloured Spanish flag. Thanks to careful nature conservation, the limestone grasslands remain open and retain their unique flora and fauna.

Fun fact
St Pietersberg is one of the Netherlands’ most butterfly-rich nature reserves. Thanks to its flower-filled limestone grasslands, the Popelmonde Valley is one of the best places to spot rare species such as the Spanish flag and the swallowtail.