Experience the Magnificence of Cabo Rosa (Tuneles) on Isabela Island

You’re looking at a day-long adventure that combines geology, wildlife, and marine life in one of the Galápagos’ most iconic spots. For $199 per person, this 5-hour tour offers a chance to explore lava tunnels and bridges formed by volcanic activity, and then snorkel in crystal-clear waters teeming with marine creatures. The tour departs from Puerto Villamil and includes hotel pickup, snorkeling gear, and a boxed lunch — all designed with comfort and value in mind.
What we really appreciate about this experience is that it’s led by a naturalist guide who can bring the landscape to life. The small group size, capped at 16 travelers, ensures more personalized attention and a chance for genuine interaction. Our favorite parts? The stunning volcanic formations above and below water, and the opportunity to see marine species like manta rays, sea turtles, and penguins in their natural habitat.
One thing to keep in mind: the tour’s description suggests you’ll snorkel through the tunnels themselves, which some travelers might find misleading based on recent reviews. Also, the tour is timed around low tide, so early bookings are ideal to maximize snorkeling opportunities. This tour suits those who love active outdoor adventures, are comfortable with snorkel gear, and want to experience diverse ecosystems in a single day.
Key Points

- Unique Geology: Explore lava tunnels and bridges formed by volcanic activity—an unforgettable landscape.
- Wildlife Encounters: Prime opportunity to see penguins, sea turtles, manta rays, and blue-footed boobies.
- Guided Experience: Led by a knowledgeable naturalist guide who enhances your understanding of geology and biodiversity.
- All-Inclusive: Includes snorkel gear, a boxed lunch, and hotel pickup—great value for a full-day adventure.
- Small Group: Limited to 16 travelers for a more intimate and personalized experience.
- Timing: Best enjoyed during low tide, so plan accordingly for optimal snorkeling.
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A Close Look at the Cabo Rosa (Tuneles) Tour

The Setting: Lava Formations and Marine Paradise
Our journey begins with a ride from Puerto Villamil to the coast of Isabela Island. The ride itself sets the scene—lush volcanic landscapes fading into a shoreline dotted with lava platforms and tunnels. The Cabo Rosa tunnels are formed from lava flows that cooled and collapsed into the sea, creating a network of lava bridges and tunnels, some above water, some under.
These formations are truly striking, with colors ranging from dark black to reddish hues, contrasted by the bright blue sky and the clear waters below. The lava structures provide shelter and breeding grounds for various marine species, making this area a true marine sanctuary.
Exploring the Tunnels and Lava Structures
Once at the site, you might expect to walk into the tunnels and snorkel through them. However, recent reviews note some confusion here—snorkeling inside the tunnels may not be part of the actual experience. Instead, you’ll snorkel around the exterior lava formations, with the guide highlighting the interesting geology and pointing out different marine animals.
The lava bridges and platforms above water are fantastic for photos and give a real sense of the volcanic forces that shaped this region. We loved the way the guide explained the geological processes, making these formations feel alive and dynamic.
Snorkeling in Crystal Clear Waters
Included in the tour is the use of snorkel gear—and here’s where the adventure truly shines. The waters are usually calm and transparent, making it easy to spot sea turtles gliding gracefully, manta rays sweeping by, and seahorses hiding among the rocks. The marine biodiversity is impressive, with colorful fish, sea lions, and blue-footed boobies soaring overhead.
One of the highlights, according to reviews, was the opportunity to see baby blue-footed boobies, especially if you do the tour during early morning low tide. Our guide, Michael, was praised for taking lots of pictures and listening to what everyone wanted to see, making the snorkeling a personalized experience.
Wildlife and Birdwatching
Beyond the underwater scene, the landscape is also alive with wildlife. Penguins waddle around the rocky outcroppings, while sea lions lounge on lava rocks, soaking up the sun. The opportunity to observe bird species like blue-footed boobies and other seabirds adds a rewarding dimension to the trip.
Practicalities and Amenities
The tour includes hotel pickup, so you don’t need to worry about transportation logistics. The boxed lunch means you can refuel without breaking the flow of your adventure. The small group size ensures plenty of space and attention from the guide—highlighted as a big plus by travelers who appreciate the intimate setting.
Considerations and Caveats
While most reviews are glowing, one noted disappointment: the snorkeling in tunnels isn’t actually happening inside the tunnels. The description might be slightly misleading, so if snorkeling inside the tunnels is a priority, clarify this before booking. Also, timing during low tide is crucial for the best snorkeling experience, so coordinate your plans accordingly.
Who Will Love This Tour?
This experience is perfect for adventure-seeking travelers who want a close-up view of volcanic formations and marine wildlife. It’s ideal if you’re comfortable snorkeling and enjoy small-group, guided tours that prioritize education and genuine encounters. Nature lovers with an interest in geology and biodiversity will find this tour especially rewarding.
If you’re seeking a relaxed, scenic boat ride, this might not be your best fit. But if you want an active, engaging day exploring one of the most scenic spots in the Galápagos, this tour delivers.
Final Thoughts: The Value and Experience
This Cabo Rosa (Tuneles) tour offers a balanced blend of geology, wildlife, and adventure. For the price, you get a well-organized trip, expert guidance, and access to incredible natural formations and marine life. While it’s not without minor misunderstandings—as some reviews point out—the overall experience remains impressive and memorable.
The small group size and inclusions like snorkel gear and lunch add to the value, especially given the tour’s focus on quality over quantity. If your priority is to see marine species, learn about volcanic geology, and enjoy personalized guidance, this tour fits the bill.
For travelers who love nature, active outings, and discovering hidden geological marvels, this trip is a solid choice. Just keep in mind the timing and clarify expectations regarding snorkeling inside tunnels.
FAQ

Will I snorkel inside the tunnels?
Not exactly. Recent reviews mention that snorkeling inside the tunnels may not be part of the actual tour. You’ll snorkel around the lava formations and tunnels, but not inside them.
What is included in the tour?
The tour includes snorkel gear, a boxed lunch, hotel pickup, and a naturalist guide. It’s designed to be a comprehensive, hassle-free experience.
What should I bring?
Bring your own wet suit if you tend to get cold, and consider extra personal expenses. The tour provides snorkel gear, but bringing reef-safe sunscreen and a towel is advisable.
Is this tour suitable for children?
Yes, most travelers can participate, but kids should be comfortable with snorkeling and walking on lava. Check with the provider if you have young children.
What is the best time to do this tour?
Booking during low tide is recommended for the best snorkeling experience, so plan your trip accordingly.
How big are the groups?
The tour caps at 16 travelers to ensure a more personalized and engaging experience.
In The Sum Up
The Cabo Rosa (Tuneles) Hiking & Snorkeling Tour offers a striking blend of volcanic landscapes and vibrant marine life, making it a standout activity on Isabela Island. With knowledgeable guides, small-group intimacy, and inclusions like snorkel gear and lunch, it provides excellent value for adventure lovers.
This tour is best suited for those who enjoy active days outdoors, are eager to witness unique geological formations, and want up-close marine encounters. While it may not be perfect for everyone—especially if you’re hoping to snorkel inside tunnels—most travelers will find it a memorable highlight of their Galápagos trip.
If you’re ready to explore lava bridges, spot penguins, and snorkel among manta rays, this tour could be the highlight of your Galápagos adventure. Just remember to book early, plan around low tide, and get ready for a day full of natural wonders.
