Overview
Xerri’s Grotto is a small subterranean cave system in Xagħra (Gozo). What makes it special is not only the dense concentration of mineral formations, but also its setting: the entrance is inside a private residence, and visits are typically guided by the owners.
Full history (discovery → present)
Discovery (1923–1924): The grotto was uncovered when local resident Anthony (Antonio) Xerri was digging a well beneath the family home. Instead of reaching water immediately, the digging opened into natural chambers within Gozo’s limestone—revealing a hidden interior decorated with calcified mineral growths.
Early development: Because the discovery began as a well shaft, the earliest access followed the vertical route down. A spiral staircase was later built into the shaft to make entry possible for family members and, eventually, visitors.
World War II modifications: During the Second World War the underground space gained a practical new purpose: it was used as an air-raid shelter for the neighbourhood. Accounts note that the cave was developed/extended during this period—changes driven by the need for safer shelter and usability.
Modern visitor site: In later decades, the grotto was adapted for public visiting with electric lighting and a guided format that helps protect the formations and keep the experience safe in a tight, humid subterranean environment.
Geology & formations (what you’ll see)
Xerri’s Grotto is best known for its speleothems—mineral deposits that form as water dissolves limestone, carries calcium carbonate, and redeposits it over long time spans. Inside, visitors commonly notice:
- Stalactites (hanging from the ceiling) and stalagmites (rising from the floor).
- Dense calcified textures and clustered formations in a relatively small space.
- Shape-like patterns often compared to animals or familiar objects (a classic part of the guided storytelling).
Nearby, another well-discovered subterranean site—Ta’ Ninu (Ninu’s Cave)—offers a useful comparison: both caves were found beneath private houses while digging wells, underscoring how much of Gozo’s underground remains hidden within everyday places.
Cultural significance
Beyond geology, Xerri’s Grotto reflects a very Gozitan story: family stewardship, practical adaptation in wartime, and small-scale heritage tourism that keeps local knowledge alive. Its guided format helps balance visitor curiosity with the fragility of cave environments.
Practical tips for visitors
- Expect narrow access: the spiral staircase is tight; sturdy footwear helps.
- Mind the cave environment: caves can be humid and cooler than outside; take care on damp surfaces.
- Photography: low light is common—avoid touching formations and be mindful of confined space.
FAQ
When exactly was Xerri’s Grotto discovered?
Most references place the discovery in 1923, while some cite 1924. A careful way to present it is “discovered in 1923–1924”, during well-digging beneath the Xerri family home.
What modifications were made to the cave?
The cave’s access was engineered via a spiral staircase built into the original well shaft. During World War II it was adapted for shelter use and reportedly developed/extended. Later, it gained electric lighting for guided visits.
Is Xerri’s Grotto suitable for everyone?
Because access involves a narrow staircase and confined underground spaces, it may be challenging for visitors who are uncomfortable in tight areas or have mobility limitations. Consider providing alternatives in your Gozo itinerary.
