International Tagus Natural Park

International Tagus Natural Park is a protected area straddling the border between Portugal and Spain, reached from Castelo Branco on the Portuguese side. It safeguards a river landscape of rugged banks and is among the wildest corners of the Iberian Peninsula.

Why visit?

This is a place for birdwatchers and lovers of silence. The steep, rocky riverbanks and surrounding terrain shelter species that nest in hard-to-reach spots. The area also counts among the least densely populated parts of the entire Iberian Peninsula, so a genuine sense of solitude comes easily.

What wildlife can you see?

The park's emblem is the black stork, a shy bird that favours quiet river valleys. Observers also list eagles, including Bonelli's and golden eagles, griffon and Egyptian vultures, and eagle owls. One source mentions roughly 154 bird species. Mammals, amphibians, reptiles and fish live here too, and the steep banks make the area a haven for wildlife.

What to see nearby

• Rota dos Abutres (Route of the Vultures) – a walking trail of about 10.5 km that descends from Salvaterra do Extremo into the Erges canyon. A good choice if you hope to spot birds of prey.
• Penha Garcia Ichnological Park – a geomonument within the Naturtejo UNESCO Geopark, whose cliffs are recognised as an important bird area.

Planning your visit

Bring binoculars, sturdy footwear and plenty of water, as facilities deep inside the park are modest. Spring is a good moment for watching birds during the nesting season, and mild temperatures make walking more pleasant. Castelo Branco makes a practical base, and the different sections of the park are best reached by car. For a longer stay, consider the nearby villages, where local food and lodging are easy to find.

Frequently asked questions

Is the park in Portugal or Spain? Both. It is a cross-border protected area, and the Portuguese part lies in the Castelo Branco region.

Is it a good place for birdwatching? Yes. It is regarded as an important area for conserving birds that nest on rugged riverbanks, and the black stork is its symbol.

Is it crowded? No. It is one of the least populated places on the Iberian Peninsula, so tranquillity is the main attraction.

Are there marked trails? Yes, for example the Rota dos Abutres from Salvaterra do Extremo to the Erges canyon.