Top 7 Natural Monuments around Lens

This site consists of excavation lands to access the nearby bluestone deposit. It covers one and a half hectares and has existed for over 150 years. It has gradually been covered with trees and plants, the variety of which astonishes us. Several paths allow the visit and the view of distant spaces. Here you will discover the orchard, the solar gate and an animal area. Reconstructed dolmens and menhirs also punctuate the visit, as well as a gigantic steel dinosaur skeleton and a reconstructed stonemason's workshop.

The Bois de Silly is a forest massif of 530 hectares composed mainly of beech and oak trees. Renowned for its rich biodiversity, it is particularly popular with ornithologists for the observation of five species of woodpeckers. The wood offers hiking trails accessible to all, especially to admire the carpets of wild hyacinths in spring. It is also a Natura 2000 site, protecting several habitats and species.

The old quarries of the Dendre and Congo are a historic site of exploitation of blue stone, or "small granite", from the 18th century until 1951. Today submerged, they form a vast body of water 4.5 hectares. The site is managed by the Otaries diving club and is home to rich biodiversity with more than 120 species of birds observed. The quarries, integrated into a natural setting, are a popular place for scuba diving and hiking.

In the forest of Stambruges is 'la Fontaine bouillante', the bubbling spring where, according to legend, a mistress of the Prince De Ligne drowned with her coach and the crew of the coach tries to surface. In reality, it is spring water bubbling up through a crack in the earth. https://nl.wikipedia.org/wiki/Bos_van_Stambruges

A nice forest path right through the low vegetation in the forest.

The closest access to the boiling fountain is from the Hameau des Ecacheries side. At the end of rue du Bosquet, take the dirt road that goes into the forest. Quite quickly, you will find a marked path on your left, heading east. It is at the level of a small bridge that you then discover this source whose surface of the water is constantly agitated with fine bubbles. It’s not the heat of the water, a bit hotter than it should be, that is causing this incessant bubbling. It is in fact the air which, thanks to a fault, crosses the sandy layer at the bottom of the source. The legend of the sunken coach the boiling fountain of Stambruges hides the legend of the sunken coach. This unusual phenomenon has fueled a tragic legend linked to the place. In fact, it is said that in the past, one of the princes of the house of Ligne, to which Beloeil castle belongs, not far from here, was nicknamed the great devil. A nickname due to his reputation as an unrepentant gallant. He invited a young lady to spend a romantic evening on Good Friday. The unfortunate woman never returned to her home ... Coach, horses, coachman and young girl disappeared body and well in the waters of the spring. Nobody knew that she was the cause of the accident… divine punishment or jealousy… Some murmured that the mad coachman in love with his mistress could not bear that she gave herself thus to this prince so depraved… He then rushed all his crew in the dark waters, reputed to engulf forever objects and living beings trapped in the sands that sleep at the bottom ... This is how since midnight, every Good Friday, it is said that the coach reappears for a short time. We then hear the driver cracking his whip ... Before he dives again until the following year ...

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A good spot with lots of big bumps and big holes to have fun, without real dangers.