Of the castrum Bascii or Biscii, originally belonging to the Olive Trees of Pignano, there is news since 1145, mentioned among the lands confirmed by Pope Eugene III to the Camaldolese monastery of San Salvatore di Monte Acuto.

In ancient times it was built in wood, the first plant dates back to Roman times, it was at the time the second bridge in the Marecchia Valley after that of Tiberius in Rimini. It has been rebuilt or remodeled several times, the last in 1790, but retains its medieval layout. The Ponte Vecchio of Casteldelci crosses the Senatello river and was in ancient times the only access route to the town from the valley below. It is, without a doubt, a small jewel that blends with the river landscape and with the sandstone outcrops that characterize the area.

This small unique museum boasts an amazing collection of buttons which provide an enchanting insight into four centuries of history, from the 17th century to present day.

This fascinating solitary rocky spur rises from the water; on its summit stands an architectural complex in the heart of the Nature Oasis. The sanctuary stands on a rock and is where a miraculous Our Lady of the Rosary (16th century) is venerated by pregnant women in particular. Known as the Sanctuary of the Madonna di Saiano, it is surrounded by lush greenery and is mirrored in the lakes and water of the Marecchia river. Just a few ruins and a Byzantine-style cylindrical tower remain of the old fortifications.

La Pieve is the oldest religious monument of San Leo and the entire territory of Montefeltro. It is the first material testimony of the Christianization of this area of the hinterland: the primitive cell of a history that mixes and confuses with tradition.

The Montecopiolo castle was built in the 10th century on the homonymous mountain relief at the behest of the bishops of Montefeltro or their emphyteutes (the Counts of Carpegna). It is located upstream of today's hamlet of Villagrande di Montecopiolo, the municipal capital of the municipality of Montecopiolo (province of Rimini), in the Montefeltro area. The remains of the castle are located at an altitude of 1,033 m a.s.l. at the watershed between the valleys of the Conca and Marecchia rivers. The area occupied by the castle reached 9,000 m².

The Fortress of San Leo located at the highest point of a rocky plate bordered by imposing vertical walls, the fortress represents the main architectural emergency of the entire village of San Leo. The origins of the fortified town are certainly pre-Christian, although the first documented news of a real settlement are linked to the presence of the holy Lion between the fourth and fifth centuries. The remarkable strategic position made San Leo a disputed place throughout the early Middle Ages: from the Goths to the Byzantines, passing through the Lombards (Desiderio built the first defensive garrison in masonry) up to the domination of the Church, attested from the mid-eighth until most of the tenth century.

The Sasso Simone and Simoncello Interregional Natural Park is a 4791-hectare territory located in the provinces of Pesaro-Urbino and Rimini, on the border with the Homonymous Tuscan Nature Reserve of the municipality of Sestino (AR), located in the heart of Montefeltro, falls in the municipalities of Carpegna, Frontino, Montecopiolo, Pian di Meleto, Pennabilli and Pietrarubbia.

The fortress was built about the year 1000 on the crag known as Sasso del Lupo, Wolf Rock. Its historic name, “Petra anellaria” derives from the circular shape of the rock on which it stands. It was restored and fortified by Francesco di Giorgio Martini in 1474. From 1506 to 1660 it was a fief of the illustrious Campofregoso family of Genoa; they transformed it into an aristocratic residence suitable for their elegant court.

The Sulphur Museum sees itself as a fundamental instrument in the diffusion of the history of mining culture and of the historical reconstruction of mining activity, which, during the industrial revolution, pushed the rural economy towards a new economic fabric, a new concept and organisation of work through constant and systematic production. Mines are a vital piece in the jigsaw of our history and culture, representing an element that unites us to the past of other European countries.

The Archaeological Museum of Verucchio is located in the ancient Convent of S. Agostino (dating back to the thirteenth century and expanded in the seventeenth), restored in the 80s to house a selection of finds found in the territory of Verucchio during subsequent excavation campaigns (so far 566 tombs have been excavated). They are testimonies of great historical value and in many respects unique, related to the Villanovan civilization, which represents a cultural manifestation of the region between the ninth and seventh centuries a.C. (early Iron Age).

The Alpe della Luna Nature Reserve is located in the heart of the Apennines, on the mountains that extend between the towns of Pieve Santo Stefano, Badia Tedalda, Sansepolcro and Sestino, between silent hamlets and ridges covered with woods. This beautiful and mysterious place inspired the sublime artist Piero della Francesca five centuries ago.

MFM is the museum that San Marino offers to enthusiasts, collectors, tourists and onlookers to learn about the history of the Republic through two centuries of coins and medals, stamps and works of art, unpublished and exceptional objects and documents.

The Convent of Santa Croce stands on the place where St. Francis of Assisi, passing through Villa Verucchio on the occasion of his trip to S. Leo in the year 1213, according to tradition would have planted the stick to which he supported himself during the journey around which roots and leaves were born: the gigantic cypress tree over seven centuries old that is still visible in the cloister.

The Malatesta Fortress is located in the upper part of Verucchio: also known as Rocca del Sasso for its position at the apex of the spur of rock that dominates the whole territory, it enjoys a remarkable state of conservation.

It is certainly the highest example of medieval architecture preserved in Montefeltro and is one of the most unique and important testimonies of Romanesque-Lombard architecture. The church preserves an exceptional sculptural kit that includes, in addition to the Corinthian capitals of the third century (d.C.), numerous Romanesque capitals variously figured, the oldest of which represent the symbols of early Christianity.

The museum groups together, presents and promotes the town’s archaeological, historical, artistic and architectural treasures.It is housed in the seventeenth-century Palazzo Cenci.

The uniqueness and outstanding universal value of the Onferno Caves have led to official recognition by UNESCO as a World Heritage Site.

The Pieve di San Pietro dates back to 1100 and was erected on the ruins of an ancient Roman temple that has now disappeared. Its admirable façade is divided into large quadrangles. The portal has a hanging porch, surmounted by a small mullioned window. The interior has three naves divided by pillars with an elevated presbytery and a crypt. The church was included by the French actor Alain Delon in his film "The First Night of Quiet".

The curious and fascinating fortress known as Maioletto is easy to spot from even the most isolated part of the valley.