A Historical Treasure on Brazil’s Borders
A Fortress in the Amazon Jungle
Located in the municipality of Costa Marques, in the state of Rondônia, Fort Príncipe da Beira is one of the oldest and most important military constructions in Brazil. Built on the banks of the Guaporé River, right on the border with Bolivia, this national historic monument preserves memories from the colonial period and symbolizes the Portuguese presence in the Western Amazon. For tourists and history enthusiasts, visiting the fort is a true journey through time.
Construction of Fort Príncipe da Beira began in 1776 and was completed in 1783, during the reign of Dom José I, under the command of the Marquis of Pombal. The goal was to protect the territory of the Captaincy of Mato Grosso against Spanish incursions, consolidating the Luso-Brazilian presence in the region after treaties that defined the boundaries between the Iberian colonies.
Imposing and Strategic Architecture
Fort Príncipe da Beira is an example of 18th-century military architecture. Its square layout, with robust stone and lime walls, occupies an area of over 15,000 square meters. The structure has four bastions at the corners, where defense cannons were placed, as well as guardhouses, internal quarters, and an underground dungeon.
The location for its construction was no coincidence: positioned on the banks of the Guaporé River, the fort allowed control of vessels and monitoring of the river border. Even after centuries, its structure remains imposing, with walls reaching five meters in height and more than a meter in thickness.
Today, it is still possible to see remnants of old cannons, guardhouses, and other original facilities. The view from the top of the fort offers a spectacular panorama of the river and the forest, providing unforgettable moments for visitors.
Historical and Cultural Importance
Fort Príncipe da Beira is a landmark in the history of Brazilian territorial expansion and the assertion of national sovereignty. It played a strategic role in defending borders and controlling trade and communication routes along the river.
During the colonial period, the fort housed soldiers, officers, enslaved people, and missionaries, functioning as a small self-sufficient community. In addition to its military function, it was also a logistical support point and a center for religious catechesis.
In 1930, the site was listed as a National Heritage Site by the Institute of National Historical and Artistic Heritage (IPHAN), recognizing its significance to Brazil’s history and culture. Since then, the fort has undergone several renovations and interventions to ensure its preservation.
Furthermore, the fort is a symbol of cultural resistance and a reminder of the importance of Brazilian presence in the Amazon border region. Over the years, it has become a place for reflection on the building of national territory and the defense of local communities.
A Tourist Experience
Visiting Fort Príncipe da Beira is a unique experience. For tourists arriving in Costa Marques, the tour is an immersion into a deep Brazil, full of lush nature and living history. The journey to the site is itself an adventure, usually made by land, crossing impressive natural landscapes.
Local guides usually accompany visitors, sharing curiosities and historical facts about the fort, its legends, and the characters who once lived there. One of the most popular activities is the sunset tour, when the sunlight highlights the walls and creates an ideal setting for photographs.
Tourism in the region is still underexplored commercially, which makes the experience more authentic. Small inns, family-run restaurants, and direct contact with the local population make the visit welcoming and enriching.
With the strengthening of public policies focused on tourism and the appreciation of historical heritage, there are great prospects for sustainable growth in the region. Encouraging visits to the fort also contributes to income generation and social inclusion.
Culture, Legends, and Traditions
Fort Príncipe da Beira is also the setting for various legends and cultural expressions. Local residents tell stories about soldier ghosts, secret passages, and hidden treasures. These narratives, passed down from generation to generation, are part of popular imagination and enchant visitors.
Cultural events are also held around the fort, including music festivals, folk dances, and craft fairs. These activities strengthen local identity and help promote the region’s traditions.
Gastronomy is also a highlight. Dishes based on fish, such as grilled tambaqui and piranha soup, are highly appreciated, as well as regional fruits and homemade sweets.
Contact with local culture allows tourists to authentically experience the customs and values of Amazonian communities. Hospitality, storytelling, and traditional knowledge make the visit even richer and more meaningful.
Tips for Visitors
For those planning to visit Fort Príncipe da Beira, it is important to plan the trip carefully. Costa Marques is located about 700 km from Porto Velho, and access may require patience and preparation. It is recommended to travel in a 4×4 vehicle, especially during the rainy season.
Bring light clothing, sunscreen, a hat, water, and comfortable shoes. Don’t forget a camera or a smartphone with a good camera to capture every detail of the visit. If possible, hire a local guide to enrich your experience.
The best time to visit is during the dry season, from May to September, when the roads are in better condition and the weather is milder.
It is also advisable to carry some cash, as the region may have limited connectivity and access to banking services. Staying informed about road conditions and local safety is essential.
A Heritage That Must Be Valued
Fort Príncipe da Beira is a heritage site that represents the resilience, identity, and history of the Brazilian people. Its existence not only marks the Portuguese presence in the Amazon but also symbolizes the cultural diversity and richness of the region.
Promoting historical tourism in places like this is essential for heritage education, regional development, and the preservation of national memory. By visiting Fort Príncipe da Beira, you are not just seeing a tourist site—you are helping to keep a vital part of our history alive.
Heritage education projects and awareness campaigns about the importance of the fort are indispensable for future generations to understand the value of this monument. Creating interpretation centers and educational activities can expand the reach and impact of cultural tourism in the region.
Include this destination in your travel itinerary and discover one of Brazil’s best-kept secrets. Fort Príncipe da Beira awaits you with its imposing walls, mysterious legends, and an unforgettable experience in the heart of the Western Amazon.
