Coves de Sant Josep offers its visitors a quiet boat ride along one of the most spectacular navigable underground rivers. The visit includes a section by boat of 800 meters and a walk of 250 meters.
The visit lasts approximately 40 minutes, with a constant temperature of 20ºC throughout the year. It represents the longest-traveled cavity in the province of Castellón and the second in the entire Valencian Community. It is the longest navigable underground river in Europe.