It’s a naturalistic oasis that includes an area of 35 square feet between San Floreano Hill and the provincial roads of San Daniele-Fagagna and Majano-Fagagna. It is characterized by presence of naturalistic heritage of great interest which are at risk of extinction or destruction with related protection rules. This delimited space contribute to the maintenance of biodiversity in the regional territory thanks to the presence of botanical species included in the Red List.

The castle of Arcano Superiore was built in the XII century by Ropretto, he was the son of Leonardo a component of the royal family of Croatia that inherited the land where the castle was built, from emperor Ottone II. In the 1420 the castle was under the domination of the Republic of Venice and in the 1511 it was damaged by a peasant revolt. During the following years the castle was refurbished and expanded, today it preserves the medieval heritage with the characteristics crenellated curtains , the double tower, a room with frescoes of Andrea Urbani and other rooms with fireplaces and portals of Raffaello de' Raffaelli.

The little church of San Mauro is located on the fluvial terrace of the Corno river and is surrounded by a wall made from pebbles that once contained the old cemetery. The present-day sixteenth-century building is the result of remodeling and extension of an earlier church that dates back to the 12th and 13th centuries, as testified by the frescoes found inside. However, the first information relative to the church goes back to 1380, when it was erected as a chaplaincy. The building was destroyed by the Turks at the end of the 15th century and it was rebuilt shortly afterwards. Already the seat of the Parish church of Rive, the church has a rectangular main hall with an exposed trussed roof and a presbytery with a ribbed cross vault. The entrance hallway with a depressed arch and sacristy are from a later period. Inside, on the right-band wall, there is the most ancient fresco, dating back around the 12th-13th centuries, depicting Young Christ; while on the walls and on the counter-facade there are frescoes of the Las Judgment, History of the life of christ, Virgin and Child, Saints, Coronation of the Virgin, dating back tot he end of the 14th century or the beginning of the next and can be attributed to the Friulanian post-Vitale da Bologna school.

The Fort in the locality of Col Roncone was part of the defensive line of the Medio Tagliamento. Built between 1911 and 1912, the fort was used for the storage of military goods and it was the base for various military exercises in the period between the two World Wars. At the end of the second world war it was abandoned and in the 1989 the site was salvaged and transformed into the Museum of the Tagliamento Fortress with respect to the historical architectural characteristics of the building. On the ground floor, two conference halls and an extraordinary permanent exhibition on the fortification architecture of the Great War in Friuli have been set up.

Placed on an elevated moraine terrace engraved by the confluent Petoc torrent and Corno valleys, in a favorable position with respect to the plain bowl. The Castelliere of Rive d’Arcano called “della Zucule” ( inner surface of 3,6 square meters and a perimeter of 840 meters) it’s an extraordinary testimony of the first human settlements in the territory during the Bronze Age and the first three phases of the subsequent Iron Age. On the Northen side, not defended by the steep slope of the land, an artificial agger was erected 5 meters high and 160 meters long near which shards and bronze objects were found. 
In the 1977, the section of Prehistoric Studies of the Center of South Adriatic Antiquies has conducted some excavations on site that confirmed human presence in prehistoric age. Among the pebbles, mixed with black earth, fragments of ceramic and vases were found. The characteristics of this ceramic suggest the possibility that the Castelliere of Rive d’Arcano is framed in the late phase of the Bronze Age, an era when settlements on naturally fortified hills were far from rare. Ludovico Quarina, who was the first person to survey the castellieri and tumulus tombs in Friuli, places these artifacts believed to belong to the Euganean people, between the end of Bronze Age and the first phase of Iron Age (cent. IX-VIII a.C.).
The Castelliere area is also frequented by later populations, until the fourth century as documented by the considerable quantity of terracotta shards found mainly outside the defensive agger. In the same area substantial leftover from the forge work were collected, in particular the remains of iron ore which attest the presence of a workshop for the production of metal weapons and tools.

Until the first half of the 1900s, the Pasc urban park was used as a place to water the livestock of the farmers who lived in that area, thanks to the presence of pools of water that formed after rainfall. In the following years the pools lost their usefulness and the area was transformed into a park for the use of the community. On the top of the hill there is a bell tower built in 1631 in blocks and blocks of sandstone, the belfry was renovated in 1921 bringing the total height of the bell tower to 24 meters. During the Austro-Hungarian occupation the bells were requisitioned and cast to make cannons, the current bronze ones were installed at the end of 1923. Adjacent to the park there is the church of San Floreano.