Explore Água de Pau Volcano: Janela do Inferno Hike & Caldeira Velha Thermal Pools in São Miguel
Difficulty
moderate
Duration
7–8 hours
Fitness Level
Participants should be in moderate physical condition, comfortable walking several hours on varied terrain with some elevation change.
Overview
Discover the wild volcanic landscapes of São Miguel’s Água de Pau volcano on the Janela do Inferno hike, capped by a soak in the natural thermal pools of Caldeira Velha. This full-day adventure blends stunning geology, lush flora, and soothing waters in one unforgettable experience.
Trilho Janela do Inferno + Caldeira Velha
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About This Adventure
Embark on a magical hike at the base of the Água de Pau volcano in São Miguel, where you'll encounter unique flora and fauna, cross enchanting tunnels, and be rewarded with a stunning waterfall. Conclude your adventure by unwinding in the soothing thermal pools of Caldeira Velha, creating unforgettable memories.
Embark on a magical hike at the base of the Água de Pau volcano in São Miguel, where you'll encounter unique flora and fauna, cross enchanting tunnels, and be rewarded with a stunning waterfall. Conclude your adventure by unwinding in the soothing thermal pools of Caldeira Velha, creating unforgettable memories.
Adventure Tips
Bring sturdy footwear
The trail includes uneven surfaces and tunnel passages; hiking shoes or boots provide the best support.
Pack a flashlight
Tunnels along the route require reliable light for safe passage—don’t forget a headlamp or flashlight.
Start early
Begin your hike in the morning for cooler temperatures and to enjoy the thermal pools at a less crowded time.
Hydrate and protect
Carry enough water and apply sunscreen, as parts of the trail are exposed to sun and can be warm.
Local Insights
Wildlife
- Azores bullfinch
- Common kingfisher
History
The tunnels on the trail were part of an early 20th-century aqueduct supplying water to local communities and industries.
Conservation
The area is protected to preserve its unique volcanic landscapes and endemic species, with guided tours helping minimize environmental impact.
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Adventure Hotspots in Ponta Delgada
Frequently Asked Questions
Recommended Gear
Hiking boots
Provide the best grip and ankle support for uneven volcanic trails and tunnels.
Waterproof jacket
Protection from sudden showers common in São Miguel’s spring climate.
spring specific
Light layers
Allows adjustment to variable temperatures along the trail and thermal pool area.
summer specific
Flashlight or headlamp
Necessary for safely navigating the trail’s historical tunnels.