Les Coves de Sant Josep
One of the longest underground rivers in Europe
The cave known as Les Coves de Sant Josep, in La Vall d’Uixó, houses a unique natural treasure: one of the longest navigable subterranean rivers on the European continent. Venturing into the depths of this cave means embarking on a silent journey through time, where water and rock have sculpted a breathtaking underground landscape filled with geological formations—such as stalagmites, stalactites, columns and flowstones—over millions of years.
The Sant Josep Natural Area, home to both the cave and the archaeological site, has provided shelter to numerous cultures, particularly during prehistoric times. In fact, thanks to the valuable remains discovered inside Les Coves de Sant Josep, there is clear evidence that the cave was inhabited over 16,000 years ago, during the Upper Palaeolithic period.
Did you know? Although over 3 km of the cave system has been explored, the exact origin of the subterranean river remains a fascinating mystery that neither speleologists nor cave divers have managed to fully decipher.
Boat trip through
Les Coves de Sant Josep
This underground landscape can be visited on a pleasant 800-metre boat trip and a 250-metre walking tour through a dry gallery.
During the journey, the team of guides propels the boat manually using a wooden pole, with no engine noise to disturb the trip. This allows you to connect with the serenity of the surroundings and appreciate the true magic of silence inside the cave.
🌡️ 20 ºC all year round.
🕒 Duration: 40 minutes.
⚠️ Limited capacity: advance booking on the official website is highly recommended.