Coa Valley Rock Art

The engravings here are not in a cave. Along the lower Coa and its confluence with the Douro, Palaeolithic hunters cut horses, aurochs, ibex and fish into vertical schist panels in the open air, and the same rocks were reworked for thousands of years afterwards, down to modern initials. The art came to notice in the early 1990s during survey work for a dam; the dam was abandoned and an archaeological park took its place. Visits run as small guided groups driven out to three main sites - Canada do Inferno, Penascosa and Ribeira de Piscos - where a guide angles a lamp to raise the lines. A museum above the valley sets out the context. UNESCO listed the valley in 1998.

What you actually see

• Penascosa - the afternoon site, with superimposed horses and aurochs on riverside schist.
• Canada do Inferno - panels close to the water, some submerged when the river runs high.
• Ribeira de Piscos - a walking route to engravings including two entwined horses.
• The Coa Museum - a concrete block above the confluence explaining the panels and the dating.

When to go

Late afternoon light is what makes the pecked lines legible, so the park schedules Penascosa for the end of the day and books fill first. Reserve weeks ahead in summer. Spring and autumn are best - the valley bakes above forty degrees in July and August, and winter rain can cancel the river-level sites.

Honest expectations

This is a demanding visit that rewards patience. The engravings are faint, weathered and hard to read without the guide's lamp, and photographs rarely show anything. Access is by jeep on rough tracks with short walks on loose ground. Numbers per site are capped, so turning up without a booking usually means no visit at all.

Nearby

The Douro wine terraces begin just downstream, and the Pocinho railhead ends the scenic line from Porto.