Caves of Remouchamps: World’s Longest Underground Boat Ride

Hidden in the heart of the Belgian Ardennes, the Caves of Remouchamps offer one of the most breathtaking underground experiences in Europe. Famous for housing the world’s longest underground boat ride open to tourists, these caves are a true natural wonder that blend history, geology, and adventure.

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

A Must-Visit in the Ardennes Region

Located in Aywaille, the Caves of Remouchamps have been drawing visitors since 1828, and with good reason. The cave system is filled with dramatic stalactites and stalagmites, narrow passageways, and awe-inspiring chambers like “The Cathedral,” a 40-meter-high hall large enough to fit a 12-story building.

But the most unforgettable part of your journey? A 700-meter-long boat ride along the underground Rubicon River, making it the longest subterranean boat ride open to tourists anywhere in the world. It’s a magical, silent glide beneath vaulted ceilings, something you’ll never forget.

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

From Stone Age Shelter to WWII Refuge

This cave isn’t just a natural marvel, it’s steeped in history. More than 8,000 years ago, Paleolithic hunters sought shelter here. During World War II, it served again as a refuge. In between, it was even used as a wine cellar thanks to its constant cool temperature. Each visit is not only an exploration of geology, but also of human history.

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

What to Expect on the Tour?

Duration: Approx. 75 minutes
First part: An 800-meter walk through sculpted galleries with towering limestone formations
Second part: The thrilling underground boat ride on the Rubicon

Highlights include:
  • The towering Cathedral Hall
  • Natural light shows from installed cave lighting
  • Narrow canals winding through eerie, beautiful silence
The cave is well-lit and the paths are safe, though a jacket and sturdy shoes are recommended as it stays cool inside year-round.

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

Practical Info

Address: Rue de Louveigné 3, 4920 Aywaille, Belgium
Website & tickets: lesgrottes.be
Open: Most of the year (check the site for hours and seasonal closures)
Languages: Tours available in French, Dutch, English, and German

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

The longest underground boat ride in the world open for tourists in the Caves of Remouchamps

Why Visit the Caves of Remouchamps?

If you're a nature lover, history buff, or just looking for a unique and family-friendly adventure in Belgium, the Caves of Remouchamps are an absolute must. They offer an unforgettable journey underground where natural beauty meets ancient human stories, topped with the thrill of floating through the Earth’s hidden depths.
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