Area guide · Lago General Carrera
Marble Caves (Marble Cathedral): a guide to visiting them
The Marble Caves, also known as the Marble Cathedral or Capillas de Mármol, are rock formations on Lago General Carrera in the Aysén Region of Chile. You visit them by boat or kayak from Puerto Río Tranquilo, on tours of 1.5 to 4 hours, and they lie about 15 km from Chelenko Lodge.
Last updated: October 12, 2026
Quick facts
The essentials before you decide
| Location | Lago General Carrera, Aysén Region, Chile |
|---|---|
| Distance from Chelenko Lodge | About 15 km to Puerto Río Tranquilo, where the tours depart |
| How to visit | By boat or kayak, with local operators |
| Duration | Between 1.5 and 4 hours, depending on the route |
| Best season | December to March, in the morning |
| Who runs the tours | Tour agencies in Puerto Río Tranquilo |
| Difficulty | Boat: low. Kayak: moderate, needs favorable lake conditions |
| What to bring | Windbreaker or waterproof jacket, layers, a hat, sunglasses, and a camera with a strap or waterproof case |
| Cost | To be confirmed with each tour agency. Depending on the route (1.5 or 4 hours) and the time of year, it can range from about CLP 20,000 to CLP 60,000. |
See what it looks like
The caves from above
In these videos we fly drones along the shore and over the Marble Caves (also known as the Marble Cathedral), on the lake the Tehuelche called Chelenko. The aerial footage follows the lakeshore and moves in on the formations, where you can see the turquoise water and how the caves continue beneath the surface, something you can hardly make out from a boat or a kayak.
Getting there
How do you get to the Marble Caves?
The tours depart from Puerto Río Tranquilo, on the Carretera Austral (Route 7). From Chelenko Lodge it is about 15 km south, 20 to 30 minutes by car. If you are coming from Balmaceda airport, it is about 177 km, roughly 3.5 hours. On our Before you arrive page you will find each route in detail, the state of the road, and seasonal recommendations.
Choosing a tour
Boat or kayak: which is better?
Boat
The most accessible option. No experience needed, it is faster, and the route can include the main formations.
Kayak
Lets you go in slower and closer to the formations, for a calmer experience. It needs favorable lake conditions and some fitness.
If you are not sure, the boat is the safest choice for a first visit and for families.
When to go
What is the best time of year to visit?
To choose well, it helps to tell apart seeing the most intense colors from having a better chance of entering the caverns: they do not always coincide.
- Best season for the turquoise: December to March.
- Best season to try to enter the caverns: spring and autumn, especially October, November, March and April.
- Best time of day: early in the morning, ideally a departure between 8:00 and 10:00 and preferably before noon, when light can reach into the cavities. The exact time depends on the season and the weather.
Can you go in winter?
Yes. In winter, June to August, boat trips run when operators judge conditions to be safe. Expect more cold, wind, rain and possible cancellations because of waves. Some operators also cut back their departures or close for a while.
- Upside: fewer tourists and a quieter experience if the weather cooperates.
- Downside: less certainty that you can sail, and less chance of the light conditions that bring out the turquoise.
- Our advice: confirm the departure with the operator the same day and bring thermal clothing, a windbreaker and rain gear.
Reference prices
How much does it cost?
Paid activities are arranged directly with the tour agencies. For reference, these are the estimated prices per person that we have observed.
| Tour | Spring–summer (Sept.–Mar.) | Autumn–winter (Apr.–Aug.) |
|---|---|---|
| Short: 1.5 hours | CLP 20,000–30,000 | CLP 25,000–35,000 |
| Extended: 2.5–4 hours | CLP 30,000–50,000 | CLP 35,000–60,000 |
Reference prices per person as observed. They are not guaranteed rates. Each agency sets its own and handles the booking directly.
Frequently asked questions
What guests ask us most
What are the Marble Caves?
They are rock formations on Lago General Carrera that you visit by boat or kayak from Puerto Río Tranquilo.
How long does the tour last?
Between 1.5 and 4 hours, depending on the route you choose.
What is the difference between the Marble Chapels, the Cathedral and the Caverns?
They are all natural marble formations sculpted by water and wind over thousands of years. The difference lies mainly in their shape, size and appearance.
Marble Chapels (Capillas de Mármol): Formations with arches and columns that recall small chapels. Their pale, curved, eroded walls make very photogenic shapes above the turquoise water.
Marble Cathedral: A larger rock formation with a monumental look, whose walls and volumes evoke a cathedral. It is best appreciated from the lake.
Marble Caverns: The most descriptive name for the cavities, tunnels and caves that the water has carved into the rock. In some stretches, boats can pass under the arches or get close to the inner walls, depending on lake conditions.
Do I need to book in advance?
In high season, yes. Outside it, ask the agencies about availability.
Can I go with children?
Minimum ages must be confirmed with each tour operator.
What happens if the lake is rough?
Tours can be suspended for safety reasons. It is wise to leave a spare day.
How many kilometers are they from Chelenko Lodge?
About 15 km to Puerto Río Tranquilo, the departure point.
Stay nearby
Stay close to the Marble Caves
Chelenko Lodge sits on the shore of Lago General Carrera, about 15 km from Puerto Río Tranquilo. We have lakefront cabins, hot tubs, Starlink wifi, kayaks and fly fishing.