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It is a horizontal cave, that is, with a limited height difference, but with an extension for the length of about 800 m. It can be reached from the state road 45 bis Gardesana Occidentale, north of Arco, in the locality of La Molletta, near San Martino a Patone at a height of 225 m. Along the road, near the Giare farm, there is a gravel pit. Parked, you take an uncomfortable path, steep and landslide, which ends by climbing the bed of a former torrent (canyon), after half an hour you arrive at the entrance of the cave (about 300 m above sea level). To visit it, it is recommended to be accompanied by some speleologist, or in any case to have some experience of caves. The visit lasts 2-3 hours, plus the hours to free the siphon (usually 2-3). The entrance on the western side of Mount Stivo is very large, very similar to a gigantic open mouth, for some similar to that of the devil, and develops entirely in the limestones of the Lias. The cave has 5 siphons, which divide it into two sections, of which the second is accessible only after having freed the 3rd siphon from the sand. The birth of the cave is due to the fact that a stream, now dry, came out of it. To enter you must immediately go down a 2-m boulder, perhaps using a ladder, and just beyond the first siphon, which is almost always open. Here, going forward, you reach a gate. The first section has a length of 350 m, and ends with the 3rd siphon, generally obstructed by the presence of sand, unless some visitor has already passed it recently. This siphon is located at an altitude of -21 m from the entrance, the lowest point of the entire cave. To get to the beginning of the second section, it is therefore possible to remove the accumulated sand, using the tools found on site (shovels and buckets), with an average work of 2-3 hours. Once you have reopened a narrow passage, you can slip into the second section, which is much more fascinating than the first. This section has a development of about 500 m and ends in the 5th siphon completely covered by sand. In the past, the caves group of the SAT of Arco did surveys and excavated to try to find out where the cave ended up but without result. In fact, it seems that this 5th siphon is particularly long and according to the experts' voices it could end up in a large, hitherto unexplored hall. The year of the cave's discovery is not known, and neither is its first discoverer. Historically it is only recorded in a writing by Vincenzo Zucchelli, who visited the cave together with some friends in 1885. Other explorations are also dated in the following years, until some scholars, including Battisti and Trenner, at the end of the 1800s took an interest in it. From his studies he also passed on to tourist guides, up to his first relief in the period between 1925 and 1938.
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.