borgio verezzi caves

Borgio Verezzi Caves (Italian: Grotte di Borgio Verezzi), also known as the Valdemino caves, form a karst system on the edge of Borgio, the main village of the municipality of Borgio Verezzi in the province of Savona, Liguria, on Italy's western Riviera coast. Open to visitors year-round, they rank among the most distinctive underground attractions on this stretch of coast.

Where exactly are the caves, and why "Valdemino"?

The cave network sits beneath the hills just inland from Borgio Verezzi, with its entrance on Via Battorezza. The alternate name, Valdemino, refers to the small valley where that entrance lies. The municipality itself was formed by merging two older villages, Borgio and Verezzi, and today the caves are one of the province of Savona's best-known sights.

How were the caves found?

The site was discovered by accident in 1933, when three local boys followed a fissure that had opened up near a well after a ground collapse and stumbled into the first chamber. It took until 1951 for a proper survey to take place, carried out by speleologist Giovanni Dentella and the Gruppo Speleologico Ingauno. Dentella laid out the original visitor route himself, and the cave officially opened to the public in 1970.

What will you actually see inside?

The tourist path runs for roughly 800 metres, following an underground stream, the Rio Battorezza, which has carved out several small lakes along the way. What sets these caves apart is color: iron oxide, copper, and other minerals have tinted the stalactites, stalagmites, and flowstone in white, yellow, red, and purple, earning the site a reputation as Italy's most colorful show cave. At one point guides switch off their lamps briefly so visitors can take in the shifting light and shadow on the formations. The cave is also known for its soda straws, thin hollow mineral tubes, including one measuring 2.5 metres that is said to be the longest recorded in Italy.

What do the fossil finds tell us?

Bone remains found in several chambers have been dated to between 500,000 and 750,000 years old. They include warm-climate species such as rhinoceros, elephant, tiger, and crocodile, alongside cold-adapted animals like bear, mammoth, deer, and ibex. Together, these finds point to repeated swings between glacial and warmer periods across this part of Liguria over hundreds of thousands of years.

What should you know before visiting?

Visits are guided only and last about an hour. The temperature inside stays close to 16°C throughout the year, so a light jacket is worth bringing even in summer. The route is manageable for visitors of most ages, though the ground can be uneven and damp. The entrance is at Via Battorezza 5, in Borgio Verezzi.

FAQ

How long does a visit to the Borgio Verezzi Caves take? A guided tour takes about an hour, covering roughly 800 metres of passage.

Is it cold inside? The cave holds a constant temperature of around 16°C year-round, cooler than a summer day outside but far milder than many other show caves.

Why are they called Valdemino? The name comes from the valley where the cave entrance is located, near Via Battorezza.

Are the caves suitable for children? Yes, the route works for visitors of most ages, though the surface underfoot is uneven and often damp.

Why are these caves described as Italy's most colorful? Iron oxide, copper, and other minerals have colored the formations white, yellow, red, and purple, a range rarely seen together in a single cave.