Glide through a labyrinth of collapsed lava tunnels and arches teeming with seahorses, sea turtles, penguins, and reef sharks. This is arguably the single most otherworldly snorkel site on Earth — bucket-list by any measure.
What to expect
A 45-minute panga ride southwest from Puerto Villamil deposits you at a landscape that looks like a cathedral built by the sea — lava tubes collapsed into turquoise lagoons bridged by natural arches. You'll snorkel three distinct zones: the open ocean arch, the calm inner lagoon where seahorses cling to black coral, and a shallow channel patrolled by white-tip reef sharks resting on the sandy floor. Galapagos penguins perch on lava ledges just inches away, utterly unbothered by your presence. The guide narrates every encounter with the precision of a field biologist.
Good to know
Tours depart Puerto Villamil at ~8 AM and return by 1–2 PM — confirm your ship's all-aboard time before booking, as the tender from Caleta Tagus to Puerto Villamil adds ~45 min each way. Book at least 2–3 days ahead; slots fill quickly. Bring motion-sickness medication if needed for the open-water panga crossing.
Sail there
Luxury cruises that call at Isla Isabela (Caleta Tagus) — book through us, the fare is identical and your concierge stays on your side.
More to do in Isla Isabela (Caleta Tagus)
- Tagus Cove Kayak & Snorkel: Cliffs, Iguanas & Darwin's Lake
- Sierra Negra Volcano Crater Rim: Hike One of Earth's Largest Calderas
- Las Tintoreras: Private Islet Walk with White-Tip Sharks & Penguins
- Concha de Perla: Snorkel a Hidden Lagoon at the Edge of Town
- Wall of Tears & Flamingo Lagoon: Isabela's Dark History & Pink Splendour