Day Trip to Alcoutim and Mértola: Border Views and the World’s Only Cross-Border Zipline

For those staying in Tavira and looking to escape the coast for a day, a drive inland to the historic villages of Alcoutim and Mértola offers a completely different side of the Algarve – one shaped by river valleys, whitewashed hill towns, and a quiet echo of frontier history.

Start your journey heading east from Tavira along the N125 or A22 towards Castro Marim and then north along the N122, passing rolling hills and cork oak forests until you reach Alcoutim, a tranquil village on the banks of the Guadiana River. Directly across the water lies Sanlúcar de Guadiana, its Spanish twin, and the two towns have shared centuries of peaceful coexistence – even exchanging festivals and customs. From the waterfront promenade in Alcoutim, you’ll enjoy beautiful views across to Spain, while the castle ruins above the village offer panoramic vistas and a small archaeological museum worth visiting.

But perhaps the most thrilling way to experience the border is not by boat or bridge – but by zipline. From Sanlúcar, adrenaline-seekers can launch themselves across the Limite Zero zipline, the only cross-border zipline in the world. In just under a minute, you’ll fly 720 meters across the river at speeds of up to 80 km/h – landing back in Portugal… and in a different time zone. (Yes, Spain is an hour ahead!)

After your ride (and the small boat ride back to Alcoutim), consider continuing north to Mértola, a hilltop village nestled in the Guadiana Valley Natural Park. Its layered history includes Roman ruins, a former mosque now serving as the main church, and winding cobbled streets with traditional houses. This is one of the most atmospheric towns in inland Portugal — and a photographer’s dream.

Don’t forget to enjoy lunch at a riverside taverna, where dishes like pork with clams, grilled black pork, or wild boar stew reflect the hearty Alentejan cuisine of the region.

From Mértola, you can return to Tavira (via Martinlongo and Cachapo), the scenic N122, N124 and N397 routes — a leisurely drive through the hills, with the occasional stork nest or shepherd crossing your path.

From Tavira to the Hills: Hiking the Algarve’s Hidden Trails

Just a short drive inland from Tavira, the landscape transforms into rolling hills, dense cork oak forests, and traditional whitewashed villages. This is the Serra do Caldeirão, a mountain range that forms the natural border between the Algarve and the Alentejo regions. Despite its modest altitude, with peaks like Pelados reaching up to 598 meters, the area offers a rich tapestry of biodiversity and cultural heritage.

Nature and Trails

The Serra do Caldeirão is a haven for hikers and nature enthusiasts. Trails wind through cork oak groves, heather-covered slopes, and alongside clear streams. The region’s schist and greywacke soils support a variety of flora, including wild lavender and cistus.

Starting points like the village of Parises or areas near Cachopo provide access to well-marked trails. These routes offer panoramic views and a chance to experience the tranquility of the Algarve’s interior.

Navigating the Trails

Given the remote nature of the Serra do Caldeirão, it’s advisable to use navigation apps like Komoot, AllTrails, or Wikiloc. These platforms offer GPS tracks and user reviews to help you plan your hike. Always carry sufficient water, wear sturdy footwear, and inform someone of your planned route.

Cerro da Cabeça

For those interested in exploring the Cerro da Cabeça, it’s a separate destination located near Moncarapacho. This limestone hill, part of the Serra de Monte Figo, offers its own unique hiking experiences and geological features.

Whether you’re seeking the rugged trails of the Serra do Caldeirão or the distinctive landscapes of the Cerro da Cabeça, the Algarve’s diverse terrain provides ample opportunities for outdoor adventure.