Best caves around São Jorge are primarily volcanic in origin, featuring lava tubes, "algares" (natural chimneys), and coastal caves. São Jorge Island, a geological marvel in the Azores, offers a rich speleological heritage for exploration. These natural formations provide insights into the island's volcanic past and unique subterranean ecosystems. Visitors can explore various types of caves, from accessible lava tubes to more complex systems requiring guided tours.
Last updated: May 22, 2026
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At the PR17 tunnel exit, you step out of the darkness and directly into the sound of rushing water cascading down the valley alongside the path. The cool spray, the echoing water, and the sudden view of the green slopes create a dramatic change of mood. A short break here is worthwhile to allow your eyes and ears to adjust to the bright light and the vibrant sounds of nature.
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The levada tunnel in Madeira Natural Park leads you right through the mountain, accompanied by the echo of your footsteps and the gentle lapping of the water. Inside, a headlamp, caution, and the occasional duck are essential in the cool, damp space – but the experience is truly adventurous. At the tunnel's end, you emerge back into the daylight and are rewarded with sweeping views of the green slopes and valleys of the natural park.
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The PR9 hike features four tunnel crossings, adding a touch of adventure to the tour. Sometimes it's only briefly dark, other times you'll be walking in semi-darkness for quite a while – a headlamp or phone light is very useful here. In between, you'll enjoy views of gorges, waterfalls, and the lush green landscape of Madeira.
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The hiking trail along the Levada do Rei in the UNESCO-protected Parque Natural da Madeira is a tranquil nature experience: It runs gently alongside the narrow irrigation channel through dense laurel forest, past moss-covered trunks, damp fern beds, and small waterfalls. The surroundings convey an almost mystical atmosphere—ideal for those who want to slow down amidst pristine vegetation.
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Today, April 14, 2025, the water level in the tunnel was unfortunately too high >10cm, only passable with rubber boots.
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In the past, material was probably stored here, but today it is unfortunately used for other purposes....
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After a lot of rain (mid-March) not possible. Up to 50 cm deep and ice cold water. Reversed!
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São Jorge Island is primarily known for its volcanic caves, which include lava tubes, such as Gruta da Beira, and "algares" (natural chimneys). There are also coastal caves, like Gruta dos Corais, which are popular for diving.
While many caves require guided tours or specific equipment, some experiences are more accessible. For instance, Grutas de São Vicente offers an exhibition and film about volcanic activity, which can be very engaging for children, even if the caves themselves are currently closed for maintenance.
The caves on São Jorge showcase diverse volcanic geology. You can find extensive lava tubes, formed by ancient lava flows, and deep "algares" like Algar do Morro Pelado (140 meters deep) and Algar das Bocas do Fogo (120 meters deep), which are ancient volcanic conduits or chimneys.
For cave-related trails, such as the Tunnel and Waterfall on PR17 Levada do Paul II, waterproof shoes with good soles are essential due to wet and uneven terrain. A headlamp is also a must for dark sections within tunnels.
Some cave systems, like Grutas do Algar do Montoso, typically require a guide due to their complexity and for safety reasons. Guided tours enhance the experience by providing equipment, insurance, and insightful information about the formations and biodiversity.
São Jorge's caves are rich in biodiversity, particularly entomofauna. Rare endemic species, such as the *Pseudoblothrus oromii* (a type of pseudoscorpion), have been identified in caves like Gruta da Beira. Unique species of beetles are also reported in caves like Grutas do Algar do Montoso.
Yes, for those interested in marine speleology, Gruta dos Corais offers an exceptional diving spot. It's accessible by a short boat ride near Porto das Velas and welcomes divers of all levels to explore its underwater environment. You can find more information at visitazores.com.
Trails like the Tunnel and waterfalls on the Levada do Caldeirão do Inferno offer a realistic experience, especially after rain, with smaller and medium waterfalls. The PR9 hike with four tunnel crossings also provides adventure, with sections of semi-darkness requiring a headlamp and offering views of gorges and lush landscapes.
Beyond cave exploration, São Jorge offers various outdoor activities. You can find numerous hiking trails, including easy hikes around São Jorge, or more challenging routes. There are also MTB trails available for cycling enthusiasts. For more details, explore the hiking guides and MTB guides for the region.
Visitors frequently highlight the unique experience of exploring volcanic formations and the natural beauty. The adventure of navigating tunnels, hearing waterfalls, and witnessing the island's rich geological past are often mentioned as enjoyable aspects. The opportunity to see rare endemic species also adds to the appeal.
Yes, safety is paramount. Many cave systems, especially lava tubes and algares, can have uneven, wet, and dark terrain. It's crucial to wear appropriate footwear, carry a headlamp, and consider joining guided tours for more complex caves to ensure a safe and informative experience.


Extend your search for the best caves by checking out these guides of the top ones around São Jorge: