Guadiana International Bridge, Cable-stayed bridge between Ayamonte, Spain and Castro Marim, Portugal.
The Guadiana International Bridge extends 666 meters across the Guadiana River, featuring two towers reaching heights of 95 and 96 meters respectively.
Construction began after Portugal and Spain signed an agreement in 1985, following extensive feasibility studies that started in the 1960s.
This structure represents the southernmost land crossing between Spain and Portugal, connecting the regions of Andalusia and Algarve through international motorways.
Vehicles can cross the bridge without paying tolls, although fees apply when continuing on the Portuguese A22 motorway after entering Portugal.
The Spanish tower stands on an artificial island constructed in the riverbed, while the Portuguese tower rests on natural ground.
Location: Ayamonte
Location: Castro Marim
Inception: 1991
Official opening: 1991
Height: 20 m
Length: 666 m
Longest Span: 324 m
Part of: Portugal–Spain border
GPS coordinates: 37.23750,-7.41889
Latest update: September 23, 2025 16:45
Gustave Eiffel and his firm designed and constructed metal bridges across several continents between the 1860s and early 1900s. These structures enabled railway and road connections over rivers, gorges, and valleys. The bridges used wrought iron and later steel, with truss and arch designs that represented advanced engineering methods for their time. Examples of this work are found in Portugal, where the Maria Pia Bridge crosses the Douro River, and in France, including the Garabit Viaduct over the Truyère. In Vietnam, the Long Bien Bridge connects Hanoi across the Red River. Additional structures stand in Peru, Bolivia, and other South American countries. Many of these bridges remain operational or accessible as preserved engineering monuments.
Castle of Castro Marim
2.9 km
Castle of Ayamonte
1.7 km
Iglesia de Nuestra Señora de las Angustias
2.8 km
Torre de Isla Canela
6.4 km
Sapal de Castro Marim e Vila Real de Santo António Nature Reserve
3.4 km
Vila Real de Santo António Lighthouse
5.7 km
Iglesia de Nuestro Señor y Salvador
1.9 km
Saint Sebastian Fortress
3.3 km
El Pintado tide mill
3.8 km
Capilla de Nuestra Señora del Carmen (Ayamonte)
4.6 km
Palacio del Marqués de Ayamonte
2.4 km
Capilla del Socorro (Ayamonte)
2 km
Baluarte de las Angustias
2.8 km
Antiguo Convento de la Merced
2.9 km
Núcleo histórico pombalino de Vila Real de Santo António
4.8 km
Monumento a la Virgen de las Angustias
3 km
Casa consistorial de Ayamonte
2.7 km
Sports Complex of Vila Real de Santo António
5.4 km
Igreja Matriz de Nossa Senhora dos Mártires
3.1 km
Ermida de Santo António
3 km
Igreja de Santiago
3 km
Mercado 1.º de Maio
4.8 km
Câmara Municipal de Castro Marim
3.1 km
Câmara Municipal de Vila Real de Santo António
4.8 km
Paisaje pesquero de Isla Cristina
3.8 km
Jardim da Avenida da República
5.2 km
Capela de São Sebastião
3.2 km
Salinas de Castro Marim
3 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes