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Discover the thrill of aquatic caving in Sumidero de Vallada with expert guides, exploring deep gypsum tunnels and swimming in natural lakes for $57.

Starting at $57 per person, the Valencia: Aquatic Caving in Sumidero de Vallada offers a captivating journey into one of the world’s deepest gypsum caves. With an average duration of 5 hours, this tour takes you beneath the surface at Paraje Las Ermitas Vallada, guiding you through about 1300 meters of underground tunnels and into natural lakes inside the caves. The professional guides from Grieta Aventura equip visitors with top-notch gear and ensure safety as they lead you through this extreme water sport adventure.
This experience is most suitable for adventurers aged 10 and above, with a focus on non-swimmers, people with mobility impairments, or pregnant women being advised against participation. The activity strikes a balance between adrenaline and awe, making it ideal for those eager to explore hidden underground worlds with expert supervision.
You can check availability for your dates here:
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The tour starts at Paraje Las Ermitas Vallada, where participants meet their qualified guides. The guides are well-versed in the area’s geology and safety protocols, making sure every participant is prepared for the five-hour adventure. The meeting point is convenient and clearly designated, providing a seamless start to the day’s exploration.

The guided tour lasts around four hours, during which guides lead you through the Sumidor Tunnel, the deepest aquatic gypsum cave in the world. The safety briefing covers the operation of the provided gear, the route, and safety procedures. Knowledgeable guides like Jose and Omar are praised for their professionalism and friendly approach, making even challenging moments feel manageable.
Participants receive a photo report after the activity, capturing memorable moments of their underground adventure. The activity is designed to be informative and thrilling, combining geological insights with adrenaline-pumping caving.

The Sumidor Tunnel stretches approximately 1300 meters, with a provisional drop of 205 meters, making it the deepest gypsum cavity in the world. Over millennia, water has shaped its geomorphology, creating the notable cavities and formations visible inside. The permanent water stream adds an element of challenge, requiring the right equipment and route knowledge, which the guides provide.
The cave’s unstable plaster materials demand caution, but the rigorous safety standards and expert supervision ensure a secure experience. The water’s presence within the tunnel offers a refreshing swim in natural lakes, a highlight appreciated by all participants.
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The tour begins at Paraje Las Ermitas Vallada, where the journey into the underground world officially starts. The guides lead visitors through the formation process of the cavities, explaining the geological history and unique features of the cave system. The route is designed to highlight the most singular elements of the cavity, offering both visual spectacle and educational value.
Participants are advised to wear swimwear, bring a change of clothes, towel, and water shoes for comfort and safety. The activity involves navigating water-filled passages, so a good level of physical fitness is beneficial—though the guides tailor the experience to accommodate different skill levels.

Once inside the Sumidor Tunnel, you’ll encounter natural lakes formed by water accumulation over time. The guides facilitate safe swimming in these lakes, providing a unique opportunity to experience the underground aquatic environment firsthand. The reflection of light on the water and the surrounding limestone formations create a surreal atmosphere.
This activity balances adventure and safety, with guides continuously monitoring participants. The water in the caves is clear, and the experience of swimming in an underground lake adds an adrenaline rush to the exploration.

The meeting point is at the parking lot of Paraje Las Ermitas Vallada, with transportation not included but easily accessible. The tour includes all necessary equipment such as helmets and harnesses, along with company CR and accident insurance.
Participants benefit from a photo report that captures their caving moments, which is a nice memento afterward. The guides are fluent in English and Spanish, ensuring clear communication throughout the activity.
The tour is not suitable for children under 10 years, pregnant women, or people with mobility impairments, claustrophobia, or who are non-swimmers. Being comfortable with water and physical activity is recommended, as the exploration involves water passages and climbing within the caves.
Participants need to provide personal details such as height and weight when booking to ensure proper fitting equipment. It is important to bring swimwear, a change of clothes, a towel, and water shoes for comfort and safety.
Operated by Jose Francisco Carbonell Oltra, the tour consistently receives high praise. The guides’ professionalism and friendliness earn special mention, with reviews highlighting unforgettable memories, great service, and adventure-filled moments. Critics note that even cancellations were handled with private tours arranged, reflecting excellent customer service.
At $57 per person, this tour offers excellent value considering the length, depth of exploration, and quality of guides. The booking process allows for free cancellation up to 24 hours in advance and the option to reserve now and pay later, providing flexibility for travelers planning in advance.
This tour delivers an exciting underground adventure suitable for adventurers seeking a challenge and nature lovers interested in geology and natural lakes. The guides’ expertise ensures a safe, well-organized experience, even for those new to caving.
While the activity requires a reasonable physical effort and has certain restrictions, it rewards participants with breathtaking subterranean sights and the thrill of swimming inside a world’s deepest gypsum cave. Travelers who enjoy outdoor water sports, geological wonders, and guided adventures will find this tour particularly satisfying.
“Absolutely excellent! Some of the best customer service I've ever had. Very friendly very professional. Had an absolute blast!”
Is this tour suitable for children?
This activity is not recommended for children under 10 years due to safety concerns and physical requirements.
Do I need to be a swimmer?
While non-swimmers are not advised to participate, the tour provides opportunities for swimming in natural lakes within the caves, making water comfort important.
What should I bring for the activity?
Participants should bring swimwear, change of clothes, towel, and water shoes to stay comfortable and safe during the exploration.
Can I cancel my booking?
Yes, free cancellation is available up to 24 hours before the activity, ensuring flexibility if plans change.
Is transportation included?
No, the meeting point is at Paraje Las Ermitas Vallada, and transportation is not included, but the location is accessible for participants arriving on their own.
This Valencia Aquatic Caving Tour offers an unparalleled underground experience that combines geological discovery with adventure and fun. It’s perfect for those ready to explore deep tunnels and swim in natural lakes with professional guidance and safety at the forefront.
You can check availability for your dates here: