クルテドゥーの天然記念物・トップ10

水位によっては、洞窟の低い方の入り口は、ある程度乾いた状態で探検できます。

Impressive grotto under Millandre The active, vadose cave has been scientifically well studied. It is located in subhorizontal, fossil-bearing limestone. The cave river Milandrine flows through it, has a measured length of 10,520 meters and a vertical extension of 135 meters. https://de.wikipedia.org/wiki/Grotte_de_Milandre

The Source du Doubs is a powerful karst spring in a heavily karstified area of the Jura Mountains. It is located near Mouthe, in the Haut-Jura Regional Nature Park, at an altitude of 937 m at the foot of the wooded, up to 1419 m high Mont Risoux mountain range, which marks the border between France and Switzerland. The Doubs rises from a cave in the rock from a small, approximately five-meter-deep spring basin. The spring discharges an average of 1740 litres per second and is the exit of a complex cave system with several siphons. The discharge can vary greatly. Several layers of rock can be distinguished on the rock above the spring. Below the spring, the river plunges down over a small waterfall. About two kilometers below the Source du Doubs, the approximately nine-kilometer-long Cébriot flows into the Doubs.

Excellent

A place where tranquility reigns supreme.

The source of the Doue is located behind an old mill which once used dynamite from the water to grind the cereals of the region. During the hot summers, the place turns into a haven of freshness.

If you stop in Porrentruy, if you are a herb, plant and flower enthusiast, you should definitely pay a visit to the Parc du Jardin Botanique. After the botanical garden in Basel, it is the second oldest in Switzerland. It is striking that in addition to the almost inexhaustible variety of plants, one or the other sundial on several house fronts shows the time in a shadowy way. A particularly idiosyncratic and modern example can be seen at the end of the park when you enter the area through the main portal. Right next to the botanical garden, there is a public car park that is subject to a fee. From the botanical garden, you can continue your journey of discovery in the direction of the old town, or pay your respects to the castle above the city.

Over 600 local plant species from the Jura chain from Lake Biel to the Chasseral are on display. One focal point is the more than 70 varieties of roses and 180 varieties of irises, which enchant the garden in a huge sea of color when the flowers are in bloom.