イーゾラ・ヴィセンティーナの天然記念物・トップ18

静けさと景色のためにこれらの場所を訪れる価値があります

The Buso della Rana is the largest cave in the Veneto region and one of the most extensive in Italy, with a network of caves stretching almost 30 km in total (40 km including the Pissatèla complex above, to which it is connected). Located beneath the Faedo-Casaròn Plateau, it is an intricate karst system that collects and channels the plateau's waters into the Rio Rana, which flows at the entrance. It was formed when rainwater seeps into the permeable limestone surface layer and, encountering the underlying impermeable basalt (volcanic rock), flows laterally, eroding the rock. Over millions of years, this has created a complex labyrinth of horizontal tunnels, chambers, chimneys, siphons, and small lakes traversed by underground streams. Because it drains the plateau's waters, the cave is subject to flash floods, making exploration treacherous. Inside, the temperature remains constant between 10 and 12°C year-round. It is freely accessible through the monumental entrance and by proceeding along the Main Branch for about fifty meters, until reaching the first flooded corridor or Siphon, a horizontal constriction that requires crawling. From there, it is the preserve of speleologists or exciting and adventurous guided tours organized by associations like Biosphera (see link). The internal branches are not marked, and one must know the way. The name of the cave has nothing to do with the amphibian, but is an Italianized term from the Cimbrian word "roan," meaning "rocky wall," referring to the cliff at the entrance. https://www.busodellarana.it https://esplora.biosphaera.it/luoghi/buso-della-rana/

Great ride for a bit of training

The set of springs that make up the Bacchiglione stream are enclosed in a splendid naturalistic area. It is possible to access it from different points and in different ways, but in any case cycling here is wonderful. There is a refreshment point: to check its opening I recommend you visit the official website of the place, https://www.risorgivedelbacchiglione.it.

beautiful waterfall of the Rana stream

The resurgences are spontaneous outcrops of water, typical of the Po Valley: in this particular case, in the mountains the water of rain or snow origin is not retained by the karst soil of the Asiago Plateau and the Little Dolomites; instead of remaining on the surface and descending through the valleys, it infiltrates the rocks, forming cracks, tunnels and caves; after this slow journey underground, which can last 10 years, in the low plain it encounters waterproof clay layers which force it to re-emerge. It comes out very pure, very clear, full of mineral salts and at a constant temperature of 10-13°. This is how the Bacchiglione river originates, in the middle of the countryside as if by magic, and then flows through Vicenza, Padua and finally flows into the Adriatic. The Bacchiglione Resurgences are a nature reserve which, thanks to the aforementioned peculiarities of the water, create an ideal habitat to host animal and plant species not common in the surrounding areas. They are a resting place for migratory birds and there is in fact a hut for birdwatching. This oasis of peace is open on weekends and divided into three areas: the first accessible for free; the second only with a guided tour (for a fee, booking on the site a few days in advance); the last area is a complete reserve and can only be used for scientific purposes. https://www.risorgivedelbacchiglione.it

To admire this curious phenomenon, a detour from the main road is necessary. Once you reach the place, just look out into the well (with a diameter of about 50 cm) from which what is sometimes called "dragon's breath" seems to emerge from. It is nothing more than a karst cavity (characteristic of the Faedo-Casaron plateau) from which fresh air comes out (which varies between 7 and 13 degrees). Especially in the summer period, the typical rustle of the exchange of hot and cold air masses at the mouth of the cave is clearly audible. The cavity, commonly called "Buso del Lucio", was discovered by the Maladense speleologist Lucio Zanini. The valley that you travel along following the Campipiani-Faedo path is called “Valle dei Vischi”. The origin of this name is not known but it probably refers to the sound effects (breathing, hissing, moaning) that the blowing caves produce in particular climatic conditions.

The Val dei Molini is a surprisingly unspoiled and wild environment, where you enter a mysterious and evocative forest: water dominates, forming lively waterfalls and deep ravines; everywhere, lush moss covers rocks and tree trunks. You cross a series of small valleys (Val Sesura, Valle Arlene, Val dell'Asino, Val del Gambero, Val Smiderle, Val Bisele) and ford several streams that eventually flow into the Refosco stream. The Val d'Asino is particularly evocative, where two streams join in an enchanting clearing, forming waterfalls and a deep, winding ravine. The name reflects how the stream was once exploited: the remains of man-made structures, such as stone masonry and building foundations, bear witness to this. Obviously, the valley is at its best after days of rain.