Caves Near Valencia

The Caves of San José were discovered in 1902 by local schoolteacher José Segarra, who documented what would later be confirmed as the longest navigable underground river in Europe. The cave system extends 2,750 meters into the limestone massif, though only a portion is accessible via the guided boat tour that has operated since the site opened to visitors in the 1950s. The underground river maintains a constant temperature of 20°C year-round, making the cave environment stable regardless of surface weather. Visitors board electric boats that glide silently through illuminated chambers, passing stalactite formations and submerged passages where the ceiling drops within meters of the waterline. The tour covers approximately 800 meters of the river, with a brief walking section through a dry gallery featuring prehistoric rock art and mineral deposits. Logistics matter here. La Vall d'Uixó sits in Castellón province, not Valencia province, which affects transport planning for those relying on regional rail. The cave entrance lies two kilometers outside the town center at Paratge de Sant Josep s/n, 12600 La Vall d'Uixó. No public bus runs directly to the site, so visitors arriving by train face either a taxi ride or a 25-minute walk from the station. Drivers will find ample parking at the cave complex. The boat tour operates on a continuous departure system rather than fixed time slots, but capacity is finite. Tour groups form as visitors arrive, and during peak periods—typically summer weekends and Spanish holidays—the queue lengthens. The caverns near Valencia remain cool even in August, but the waiting area is open-air. Wear non-slip footwear; the stone pathways inside the cave can be damp, and the transition from boat to walking gallery requires steady footing on uneven surfaces. Photography is permitted without flash, though the low ambient lighting and movement of the boat challenge handheld shots.