Difficulty level

E

Hiking

The Terre Fumanti (Steaming Soil) between Sasso Pisano and Monterotondo

This is a unique itinerary which, starting from the village of Sasso Pisano, leads to the heart of the natural phenomena caused by geothermal energy.

As you walk over rocks reddened by steam, you can observe the surface hydrothermal phenomena that have been occurring here since the dawn of time, and you can really feel the living, pulsating forces of nature.

The fumaroles, the boiling fountains, the slowly growing sulphur crystals and the bizarre structures reveal an unusual and colourful world: an environment similar to volcanic landscapes, but in its own way inimitable, rich in geological alterations that have generated very special habitats. Few plant species manage to survive the heat or the extreme acidity of the soil, including the common heather (Calluna Vulgaris).

Also worthy of note is the abundant presence of the cork oak, which thrives at altitudes of over 600 metres thanks to its specific microclimate. For centuries, the area has been an authentic mining treasure, coveted and fought over for its many resources, including Vitriol, Alum, Kaolin and Boron.

The route climbs up to a panoramic spot in the Biancane di Monterotondo Marittimo Nature Park, with spectacular views stretching out to the sea, and then turns back down to Sasso through ancient chestnut woods, some of which are still in operation.

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Itinerary

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This is a unique itinerary which, starting from the village of Sasso Pisano, leads to the heart of the natural phenomena caused by geothermal energy.

As you walk over rocks reddened by steam, you can observe the surface hydrothermal phenomena that have been occurring here since the dawn of time, and you can really feel the living, pulsating forces of nature.

The fumaroles, the boiling fountains, the slowly growing sulphur crystals and the bizarre structures reveal an unusual and colourful world: an environment similar to volcanic landscapes, but in its own way inimitable, rich in geological alterations that have generated very special habitats. Few plant species manage to survive the heat or the extreme acidity of the soil, including the common heather (Calluna Vulgaris).

Also worthy of note is the abundant presence of the cork oak, which thrives at altitudes of over 600 metres thanks to its specific microclimate. For centuries, the area has been an authentic mining treasure, coveted and fought over for its many resources, including Vitriol, Alum, Kaolin and Boron.

The route climbs up to a panoramic spot in the Biancane di Monterotondo Marittimo Nature Park, with spectacular views stretching out to the sea, and then turns back down to Sasso through ancient chestnut woods, some of which are still in operation.

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Hiking difficulty scale

T - Tourist

Itineraries on small roads, mule tracks or easy paths, with clearly evident routes that do not pose uncertainties or problems of orientation. They generally take place below 2000 m and usually constitute access to mountain pastures or refuges. They require some knowledge of the mountain environment and physical preparation for walking.

E - Hiking

Routes that almost always turn on paths, or on traces of passage in various terrain (pastures, debris, stony ground), usually with signs. They require a certain sense of orientation, as well as a certain experience and knowledge of the mountainous territory, walking training, as well as appropriate footwear and equipment. Normally the difference in altitude is between 500 and 1000m.

EE - Expert hikers

Routes not always marked and which require a good ability to move on various mountain terrains. They can be paths or even faint traces that wind over rough or steep terrain, with steep and slippery slopes, scree and short snowfields that can be overcome without the use of climbing equipment. They need a good mountain experience, firm footing and good physical preparation. It is also necessary to have adequate equipment and equipment, as well as a good sense of direction. Normally the difference in height is greater than 1000m.

EEA - Expert hikers with mountaineering equipment

Routes that require the use of via ferrata equipment (lanyards, harness, heat sink, helmet, etc.). They can be equipped paths or real via ferratas. It is necessary to know how to use the technical equipment safely and have a certain habit of exposure and mountaineering terrain.

MTB difficulty scale

TC - Tourist

Route on dirt roads with a compact and smooth surface, suitable for vehicles.

BC - For cyclists with good technical skills

Route on very bumpy dirt roads or on mule tracks and paths with a rather bumpy but fairly smooth surface or compact but irregular, with some natural obstacles (eg rock steps or roots).

OC - For cyclists with excellent technical skills

As above but on very bumpy and / or very irregular paths, with significant presence of obstacles.

EC - Maximum level for the cycle excursionist

Path on very irregular paths, characterized by steps and obstacles in continuous succession, which require trial-type techniques.

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