Caverns of the Camuy River National Park, Camuy, Puerto Rico

The Caverns of the Camuy River National Park is one of the most spectacular natural wonders in Puerto Rico and stands as a remarkable testament to the island’s geological history. Located between the municipalities of Camuy, Hatillo, and Lares, the park is home to the Camuy River Cave System, one of the largest and most impressive cave systems in the world.

With over 10 miles of explored passageways, the cave system features more than 220 caves and an estimated 17 entrances—though experts believe there could be as many as 800 undiscovered caves still hidden beneath the limestone surface. It is the third-largest underground river and cave system globally and has fascinated scientists, spelunkers, and visitors alike for decades.

Geological Significance

The Camuy River Cave System was formed over millions of years through the erosive power of the Camuy River, which continues to flow through much of the cave system today. This underground river is a central feature of the park, contributing to the formation of vast chambers, towering stalactites, and stalagmites, and shaping the landscape in remarkable ways. The geological process that led to the creation of this cave system is an ongoing one, with the river continuously carving out new pathways and features.

One of the most unique and breathtaking features of the cave system is the Cueva Clara, a massive cavern where a natural skylight allows sunlight to filter into the cave, creating a stunning display of light and shadow on the walls. This phenomenon highlights the intricate formations within the cavern and is a highlight of any visit to the park.

Conservation and Protection

As a unique and fragile natural resource, the Camuy River Cave System is actively protected through conservation efforts. The cave system is monitored by local authorities to ensure that it remains preserved for future generations. Conservationists focus on minimizing the impact of tourism by regulating visitor numbers and maintaining strict guidelines for behavior within the caves.

The Puerto Rican government, in collaboration with scientists and local organizations, conducts ongoing research into the ecological and geological significance of the cave system. These studies help ensure that the park’s delicate ecosystems remain protected while allowing future generations to appreciate this underground marvel.

Visitor Experience

The Caverns of the Camuy River National Park is a popular natural attraction, drawing more than 150,000 visitors annually. Tours are available on a first-come, first-served basis and are led by knowledgeable guides who provide valuable insight into the cave system’s history, geology, and biodiversity. The park offers a variety of tour options, including walking tours, boat tours, and specialized ECO NIGHTS, which are organized with prior reservations.

Upon entering the park, visitors begin their journey with a short film that introduces the Camuy River Cave System and the park’s safety rules. Afterward, a trolley transports visitors to the Cueva Clara, where they can explore the vast underground chambers. These tours are accessible via paved paths, ensuring a safe and comfortable experience for visitors of all ages and abilities. The boat tour along the Camuy River inside the cave system is a unique feature that allows visitors to see the underground river up close and experience the awe-inspiring scale of the caves.

Notable Caves and Features

Cueva Clara: The park’s main attraction, Cueva Clara, is a colossal cavern where visitors can see the effects of natural lighting from a skylight above, casting dramatic shadows on the stalactites and stalagmites. The cave is more than 170 feet high, and its enormous size and geological formations leave a lasting impression on all who visit.
Espiral Cave and Sinkhole: The Cueva Espiral is another fascinating feature of the park, though it is accessible only to experienced spelunkers with special permits. Visitors can reach the entrance by descending a picturesque 205-step promenade, but the cave itself remains out of reach for most visitors.
Tri-Towns Sinkhole (Sumidero Tres Pueblos): A stunning geological feature, the Sumidero Tres Pueblos is a massive sinkhole that spans 650 feet in width. The Camuy River is visible 400 feet below from three different observation decks. The sinkhole marks the point where the municipalities of Camuy, Hatillo, and Lares converge, each offering a different vantage point for visitors.

Flora and Fauna

The park is located within the tropical karst region of Puerto Rico, an area known for its rich biodiversity. Bats play an essential role in the cave ecosystem, with species such as the Greater Bulldog Bat and the Mexican Free-Tailed Bat inhabiting the dark chambers of the caves. In addition to bats, the park is home to a variety of cave-dwelling invertebrates, which thrive in the humid, underground environment.

Outside of the caves, the park is surrounded by lush forests filled with native plants, including orchids, ferns, and towering trees. The surrounding tropical ecosystem is home to numerous species of birds, reptiles, and insects. The endangered Puerto Rican Parrot has also been spotted in the area, as well as the endemic Coquí frog, a symbol of Puerto Rican biodiversity.

How to Visit

The Caverns of the Camuy River National Park is located about 1.5 to 2 hours from San Juan by car, situated on Highway 129 (Km. 18.9), between the towns of Arecibo and Lares. Visitors should plan ahead and make reservations, especially during the high season, as the park can become crowded. Comfortable walking shoes are recommended, as well as a light jacket for the cool and damp temperatures inside the caves.

The park is open Wednesday through Sunday from 8:30 a.m. to 3:45 p.m., with the exception of holidays such as New Year’s Day, Three Kings Day, Good Friday, Thanksgiving, and Christmas.

The Caverns of the Camuy River National Park is not only a stunning natural attraction but also an important ecological and geological site. With its vast underground river system, awe-inspiring caves, and rich biodiversity, the park offers a unique and educational experience for all visitors. Whether you're exploring the majestic Cueva Clara, gazing at the vast Tri-Towns Sinkhole, or simply soaking in the natural beauty of the surrounding forests, the Camuy River Cave System is an unforgettable destination that highlights the natural wonders of Puerto Rico.