Natural monuments around Ussassa/Ussassai are characterized by mountainous terrain, dense forests, and distinctive limestone rock formations known as "Tacchi". This region in Sardinia, Italy, offers a diverse natural landscape with 6 natural monuments to explore. Visitors can discover unique geological features, lush woodlands, and natural pools. The area provides opportunities to experience pristine nature and geological wonders.
Last updated: June 1, 2026
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A uniquely shaped, towering tower, a natural monument, symbol of Ogliastra, and a key morphological feature of central-eastern Sardinia. Perhaps once a gathering place for the Nuragic peoples, it later became, in popular legend, the entrance to the underworld. It protrudes from the earth like a giant finger reaching toward the sky and, especially in this wild area, is a landmark visible from afar for hikers. Perda 'e Liana is an extraordinary rock formation declared a natural monument in 1993. The peculiar "mountain," known in Sardinian as Taccu or Tonneri, rises in the Gairo Sant'Elena area: it is the greatest witness to the erosive effects of weathering that have been affecting the vast limestone cover of Ogliastra on the border with Barbagia di Seulo for several million years. Erosion gradually isolated the "tower," forming its base. It is the highest (1293 m) of the numerous Ogliastra limestone mountains, the northern foothills of the Tonneri plateau, about two kilometers away, to which it is connected by the s'Arcu 'e su Pirastu Trottu pass. Perhaps in ancient times, they formed a single mountain ridge. Source and further information: https://www.sardegnaturismo.it/de/entdecken/perda-e-liana
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On Monte IDOLO, hikers will not come across a summit cross - as is often the case. The small sacred monument that instead rises above Sardinia is a statue of SAN MICHELE ARCANGELO. The heavenly messenger is equipped with powerful wings, which give him an imposing figure. However, one will look in vain for a sword or a lance, which are often given to him as an attribute.
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6 euros entrance fee, which is really worth it. Opening times: Only with a guided tour, approx. 45 minutes - at the following times: 10:00 a.m., 11:00 a.m., 3:00 p.m., 4:00 p.m. and 5:00 p.m https://www.escursionisadali.it/ There are 5 rooms to visit. In contrast to the well-known grottos, the lighting is more temporary and the paths are more adventurous. The following legend surrounds the grotto: The cave is called “Is Janas”, which is a Sardinian name for “fairies”. According to a legend, three fairies lived in this cave. The fairies loved food and enjoyed cooking. This is also how you cook during Lent. A priest surprised the fairies while they were eating and was hanged by them (broken stalagtite in the first room). As punishment, God turned the fairies into three stalgmites (room 2). In the fourth room the skeleton of a "Prolagus Sardus" was discovered as well as ceramic shards from the Neolithic period (3000 BC) which can be viewed in the Museum of Caglari. Geological and historical information: The cave dates back 5 million years and was discovered in the 19th century. The cave is approx. 240 meters long and has a constant temperature of 12° and a humidity of 99 - 100%. The colors of the cave are: red (iron oxide and clay), gray (manganese) and black (guano - bat excrement).
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The cave is very worth seeing. We can also recommend the restaurant.
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Very worth seeing, even if it was May 2023 with €12 entry p.p. quite expensive
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Natural "monument" of extraordinary beauty that opens up in the rocks of Taccu di Osini. Legend has it that, during a pastoral visit, St. George prayed that a passage would be opened in the apparently impenetrable mountain to make the passage easier.
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The natural monument Perda 'e Liana is a protected natural area of Sardinia. It is located in the municipality of Gairo, in the province of Nuoro. It was established in 1993 with a decree of the regional councilor for environmental protection. Source: https://it.wikipedia.org/wiki/Monumento_naturale_Perda_'e_Liana
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The Ussassai region is renowned for its distinctive limestone rock formations known as the 'Tacchi', which give the landscape a wild and rugged appearance. A prominent example is Perda e Liana, a uniquely shaped, towering limestone stack that serves as a symbol of Ogliastra. Another impressive geological formation is the Scala di San Giorgio, an imposing gorge with fascinating rock structures.
Yes, the region offers several natural pools. The Niala Forest features the natural pools of Tuvu Nieddu, which are ideal for a refreshing swim in warmer months. The Rio San Gerolamo valley, overlooking Ussassai, also boasts three small natural swimming pools, popular for 'acqua trek' enthusiasts. Additionally, S'Ogliu Ermanu on the Rio Perda is a crystal-clear natural pool, though access is now restricted to protect its fragile ecosystem.
The Montarbu Forest, which extends into Ussassai, is a designated fauna oasis. Here, you might spot deer, mountain goats, wild boars, foxes, squirrels, fallow deer, and mouflons. It also serves as hunting grounds for royal eagles and peregrine falcons, offering a rich experience for wildlife enthusiasts.
Yes, the area is home to several fascinating caves. The spectacular Su Marmuri Cave is an impressive stalactite cave that can only be visited with a guide. Another notable cave is Grotta Is Janas, known for its unique formations and local legends. There's also the deep Grotta de 'Sa ucca 'e ir bobòis', shrouded in local legends of hidden treasure.
Spring is particularly charming, as the forest pathways, especially in Niala Forest, are adorned with blooming peonies. Warmer months are ideal for enjoying the natural pools. Generally, spring and autumn offer pleasant temperatures for hiking and exploring the natural landscapes without the intense summer heat.
Many of the natural areas are suitable for families. The Niala Forest, with its lush holm oaks, Mediterranean scrub, and natural pools, offers an 'enchanted' setting for family walks. The natural pools of Rio San Gerolamo are also a great spot for families to enjoy water activities in nature.
Yes, some natural monuments have historical or cultural significance. Grotta Is Janas is steeped in local legends of fairies and has yielded Neolithic ceramic shards. The Statue of St. Michael the Archangel on Monte Idolo is a man-made monument on a summit, offering both religious significance and expansive views. The Grotta de 'Sa ucca 'e ir bobòis' also carries local legends, adding a mystical allure.
The region offers a variety of outdoor activities. You can enjoy hiking through dense forests like Niala and Montarbu. Water trekking ('acqua trek') is popular in the Rio San Gerolamo valley. For more structured routes, you can find options for hiking, gravel biking, and mountain biking around Ussassai.
Absolutely. The Niala Forest is an ideal destination for hiking, with pathways adorned with blooming peonies in spring. For a unique experience, consider the 'Aquatrek on the Rio San Girolamo', an easy route perfect for exploring the natural pools. You can find more detailed hiking routes in the Hiking around Ussassai guide.
While the natural monuments themselves are in pristine, undeveloped areas, you can find cafes, pubs, and restaurants in the nearby municipality of Ussassai. It's advisable to carry snacks and water when exploring the more remote natural sites.
Visitors appreciate the unspoiled nature and unique geological formations. The towering Perda e Liana is a favorite landmark, and the expansive views from the Statue of St. Michael the Archangel on Monte Idolo are highly praised. The impressive formations within Su Marmuri Cave also leave a lasting impression on visitors.
Public transport options directly to the trailheads or specific natural monuments can be limited due to the remote nature of some sites. It is generally recommended to use a personal vehicle to access many of these locations, especially for flexibility. Always check local transport schedules if relying on public services.


Extend your search for the best caves by checking out these guides of the top ones around Ussassa/Ussassai: