Rubicon (Belgium)

The Rubicon is an underground river in the province of Liège in the northern-central part of Belgium. It flows through the Caves of Remouchamps, where the world's longest underground trip by boat in a cave is possible 600 metres (2,000 ft).

Rubicon (Belgium)

The Rubicon is an underground river in the province of Liège in the northern-central part of Belgium. It flows through the Caves of Remouchamps, where the world's longest underground trip by boat in a cave is possible 600 metres (2,000 ft).