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The construction works were undertaken in 1613 on the remains of an ancient and previous church of Romanesque origin whose foundation dates back to between the 4th and 9th centuries and which is mentioned for the first time in a document dated 1144. Nothing has been preserved. of the ancient medieval building, which was demolished in 1613 to make way for the current factory designed by the imperial architect Giovanni Maria Filippi da Dasindo. The works, also financed by the various communities in the area, lasted for a few decades until 1630 when they had to be interrupted due to the violent plague epidemic that decimated the area — almost 3000 victims - the Arcense community; it was consecrated on May 15, 1671. Inside the collegiate church - with a single nave - there is a marble statue dedicated to the Assumption, perhaps the work of the sculptor Gabriele Cagliari from Verona . Among the altars, five are the work of Domenico Rossi, the fourth on the right is dedicated to the Blessed Sacrament - closed by an iron and brass gate - while the second altar on the left is dedicated to Mary Magdalene sculpted by the brothers Cristoforo and Sebastiano Benedetti di Castione. Above the first altar on the left there is an altarpiece depicting the Madonna with the Child Jesus, two angels and St. Michael the Archangel by Felice Brusasorzi. The wooden choir loft is the work of Giacomo Benedetti from Desenzano del Garda, completed in 1731. Adjacent to the presbytery are the two entrances in the floor that lead to an underground sepulcher where in the past the canons of the collegiate and local counts were buried. In the last years of the 19th century was buried here - provisionally - the body of Francis II of the Two Sicilies, the last monarch of the Kingdom of Naples , who died in Arco in 1894.
The city develops on the slopes of a rocky cliff from which the magnificent medieval castle dominates the entire Upper Garda valley. The castle was built as a fortified village defended by mighty walls and a good sighting system thanks to the towers on the various sides of the nucleus. The whole complex consisted of the two Renghera towers in the highest part of the cliff, and Grande as well as several buildings such as the prison rondello, the blacksmith's workshop, the cellar, the mill and three cisterns. According to some sources, its construction originated in the Middle Ages, built by the inhabitants of Arco and only later became the property of the noble Arcense family that dominated these lands. The castle was abandoned during the 18th century also following the siege by French troops in the summer of 1703 commanded by the French general Luigi Giuseppe di Borbone-Vendôme. An accurate restoration in 1986 and others in the following years, commissioned and carried out by the autonomous province of Trento and the Municipality of Arco, allowed the discovery and recovery of some cycles of frescoes depicting knights and court ladies of the medieval era. Arco castle attracts thousands of visitors every year offering an enchanting view of the area and a visit to suggestive ruins. According to some, the houses in the historic center, arranged in an arch around the cliff of the ancient castle, give the town its name, another current of thought says that the name derives from the Latin Arx, arcis la rocca, precisely due to the presence of this important fortification work. It strongly resembles (and possibly influenced) the painting Isle of the Dead by Arnold Böcklin.
It is near the Collegiate Church of the Assumption. It was consecrated in 1652 by an Albanian bishop and in 1900 it was, in addition to a place of worship, also a winter health centre. The bell tower was damaged by the bombing of the Second World War. The paintings found in the sacristy represent Sant'Andrea and other saints and the whole church was painted by the local painter Antonio Zanoni.
Located in San Martino, the church was completely rebuilt during the 16th century and inside there are several cycles of frescoes from the Italian Renaissance period.
In the hamlet of Caneve. Its construction dates back to the 14th century.
The arboretum is an area inserted in the previous Arciducale Park wanted by the Archduke Albert of Habsburg, the latter cousin of Franz Joseph I of Habsburg and who established his residence in Arco in 1872 by erecting the Villa Arciducale, and extended to one hectare. The project for the realization of the botanical garden was entrusted in the 1960 to Walter Larcher, professor of botany at the University of Innsbruck. The arboretum is rich in tree and shrub species. The plant species conserved are approximately 150 and come from different geographical areas such as southern and central Europe, eastern Asia, the Americas and African regions.