Guided Walking Tour to Caldeira Velha & Window to Hell4.6(4,248 Reviews)
From€35.00per person
Listing ID : 65711
4.6(4,248 Reviews)
Guided Walking Tour to Caldeira Velha & Window to Hell
—Duration
EnglishSpeaking Guide
Mobile ticketAccepted
About this experience
Duration7 Hours
Group SizeSmall Group
Starts AtPonta Delgada
LanguagesEnglish
Hiking & Thermal Pools — São Miguel, Azores
Janela do Inferno Walk & Caldeira Velha Thermal Pools
A full-day trek through lava tunnels, waterfall canyons, and volcanic hot springs on the heart of São Miguel Island.
This guided walking tour combines the iconic Janela do Inferno trail with a visit to the Caldeira Velha Natural Monument, offering two of São Miguel's most compelling natural experiences in a single day. The route winds through dense Azorean laurel forest, past historic water-capture infrastructure, and into a thermal sanctuary fed by volcanic springs.
The hike begins in the parish of Remédios, in the municipality of Lagoa, where the landscape shifts almost immediately upon entering a series of hand-cut tunnels. These passages open onto a green corridor of endemic vegetation, leading to the waterfall at Janela do Inferno, whose waters once supplied the cities of Ponta Delgada and Lagoa through a gravity-fed aqueduct system.
After completing the trail and taking a lunch break, the group ascends to the Serra de Água de Pau, the volcanic massif at the center of the island. Weather permitting, there are views over Lagoa do Fogo, one of the Azores' most isolated crater lakes. The day concludes at Caldeira Velha, where warm mineral-rich water pools tucked beneath tree ferns offer a natural soak before the drive back along the north coast.
Tour Highlights
Walk to the Janela do Inferno waterfall, framed by sheer basalt walls and dense native forest.
Pass through historic lava tunnels and stone bridges that form part of a century-old water supply network.
Hike through one of São Miguel's most biodiverse forest corridors, rich in endemic Macaronesian flora.
Ascend to the Serra de Água de Pau caldera rim for a panoramic view over Lagoa do Fogo, subject to weather conditions.
Bathe in the thermal pools of Caldeira Velha, a protected natural monument with geothermally heated spring water.
Return via the north coast road, offering a different perspective of São Miguel's coastal scenery.
Itinerary
1
Briefing at Picos de Aventura, Ponta Delgada
The group meets at the Picos de Aventura base for a safety and route briefing before departing by vehicle toward the trailhead in the parish of Remédios, Lagoa.
2
Trailhead at Remédios — Tunnel Entry
The hike begins in a cultivated landscape that transitions sharply into thick forest after the first tunnel. The change in vegetation density is one of the trail's most distinctive features.
3
Janela do Inferno Waterfall
The group reaches the waterfall and the adjacent water-capture structures, which channeled freshwater to Ponta Delgada and Lagoa for generations. This is a natural rest and photography stop.
4
Trail Completion — Lunch Pause
The route continues through additional tunnels, bridges, and open pastureland before arriving at a dirt track with views of the south coast. A lunch break follows the end of the hike.
5
Serra de Água de Pau — Lagoa do Fogo Viewpoint
The group ascends to the caldera summit where, weather permitting, there are unobstructed views over the Lagoa do Fogo crater lake, one of the most remote natural sites in the Azores.
6
Caldeira Velha Thermal Pools
A stop at this protected volcanic site allows participants to swim in geothermally heated mineral pools surrounded by giant tree ferns before returning to Ponta Delgada via the north coast.
What Is Included
Included
Certified local guide throughout the tour
Transport from Ponta Delgada and back
Briefing and route safety information
Entry to Caldeira Velha Natural Monument
Not Included
Lunch and personal food supplies
Swimwear, towel, and personal items
Travel or personal insurance
Gratuities for the guide
Important Information
Participants should come prepared for variable mountain weather. Layers are advised even in summer months, and waterproof footwear is strongly recommended year-round.
Duration
Approximately 7 hours including transport, hiking, lunch break, viewpoint stop, and thermal pool visit.
What to Bring
Hiking boots, comfortable clothing, light jacket, extra layer, snacks, water, swimwear, towel, daypack, sunscreen, and hat. Trekking poles and gaiters are recommended in winter.
Cancellation
Please review the cancellation policy at the time of booking. Weather-related changes to the itinerary may occur at the guide's discretion for safety reasons.
Accessibility
This trail involves uneven terrain, tunnel passages, and an ascent to volcanic highland. It is not suitable for participants with reduced mobility or significant physical limitations.
Age Range
Open to participants aged 6 and above. Children aged 6 to 11 have a reduced rate. Adult pricing applies from age 12 onward.
Book Your Spot
Places on this guided day tour are limited to keep group sizes manageable and to protect the natural environment. Secure your place in advance to avoid disappointment.
The tour begins and ends at the Picos de Aventura office in Ponta Delgada. Transport to and from the trailhead and all subsequent stops is included in the tour.
Is the Janela do Inferno trail suitable for children?▼
Children aged 6 and above are welcome. The trail includes tunnel sections and uneven paths, so appropriate footwear and adult supervision are required at all times.
Will we definitely see Lagoa do Fogo?▼
The Lagoa do Fogo viewpoint stop is subject to weather conditions. The Serra de Água de Pau caldera frequently experiences cloud cover, and visibility cannot be guaranteed.
Can we swim at Caldeira Velha?▼
Yes, the Caldeira Velha stop includes time for bathing in the thermal pools. Participants should bring swimwear and a towel, as these are not provided.
What footwear is required for this tour?▼
Hiking boots with ankle support are required. Trail running shoes may be acceptable in dry summer conditions, but boots are strongly advised given the tunnel terrain and potential mud.
Is lunch included in the tour?▼
Lunch is not included. Participants should bring their own food and sufficient water for the hiking portion. A lunch break is scheduled after the trail is completed.
Janela do InfernoCaldeira VelhaSão Miguel HikingAzores Nature TourThermal Pools AzoresLagoa do FogoGuided Hike AzoresVolcano TrailPonta Delgada Day TripAzores Forest WalkWaterfall HikeSerra Agua de Pau
This tour operates on São Miguel Island, the largest island of the Azores archipelago, located in the North Atlantic Ocean and part of the autonomous region of Portugal. The route spans three distinct geographic zones: the south coast municipality of Lagoa (Remédios parish), the central volcanic massif of Serra de Água de Pau (which contains the Lagoa do Fogo crater lake, a protected nature reserve), and the north slope at Caldeira Velha, a Natural Monument within the Parque Natural da Ilha de São Miguel. Ponta Delgada, the island's capital and the regional capital of the Azores, serves as the departure and return point. The Azores sit on the Mid-Atlantic Ridge, giving the islands their characteristic geothermal activity, dramatic relief, and endemic biodiversity — all of which are directly encountered on this tour.
Type: Guided Full-Day Hiking Tour | Location: São Miguel Island, Azores, Portugal | Region: North Atlantic, Macaronesia | Themes: Volcanic Landscapes, Waterfall Trekking, Thermal Bathing, Endemic Forest, Crater Lakes | Operator Base: Ponta Delgada | Natural Sites: Janela do Inferno, Caldeira Velha Natural Monument, Lagoa do Fogo Nature Reserve, Serra de Água de Pau | Suitable For: Families (6+), Active Travelers, Nature Enthusiasts | Season: Year-Round
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