The beaches and rocky shores of Guanabara Bay, located within the boundaries of the municipality of Rio de Janeiro, form a coastal territory deeply marked both by its natural geodynamics and by the effects of urbanization and the city's historical occupation. They stretch from Urca, at the foot of Pão de Açúcar, to the Zona Norte, around Ramos and the Maré Complex, tracing a coastline that combines rocky stretches, coves, sandy beaches, and areas of restinga and residual mangrove.
At the entrance to Guanabara Bay, the beaches of Urca, Vermelha, and Leme rest on granite-gneiss headlands associated with the outer edge of the isolated formations of the Maciço da Tijuca, featuring active cliffs and steep slopes where the crystalline bedrock is exposed in rock faces and escarpments. These are small beaches, with coarse sand and wave action controlled by the natural protection of the terrain. In this region, the headlands of Urca and Pão de Açúcar form emblematic landscapes, where the imposing rocky outcrops lean directly over the sea, creating coastal ecosystems rich in biodiversity.
Moving further into the bay, lower-energy coves emerge, such as Flamengo beach and Botafogo beach, shaped by landfills and urbanization works throughout the 20th century. In these stretches, the coastline was artificially modified, and the beaches are protected by containment structures, canals, and urban parks, such as the Aterro do Flamengo. Although washed by the bay's waters, their natural characteristics were heavily altered, both in morphology and environmental quality.
From this point onward, the changes to the coastline of Downtown Rio have been very drastic throughout history, brutally disfiguring the Glória inlet, from Santa Luzia Beach, at the foot of the now-extinct Morro do Castelo, to the former Ponta do Calabouço, today completely transformed under the features of Marina da Glória and Santos Dumont Airport. Moving on toward Downtown, Praça XV Beach was, in the very first years of colonization, turned into a port area, undergoing a series of landfills aimed at pushing the beach arc formed between Morro do Castelo and Morro de São Bento out over the sea. The beach that once existed there disappeared, leaving as its only monument the beloved Chafariz do Mestre Valentim, on the old edge of the wharf, built to serve as a water supply station for the boats and ships of the time.
From Morro de São Bento to Ponta do Caju, the beaches were completely transformed, giving rise to today's Port Region. Prainha de São Francisco, praia da Saúde, praia da Gamboa, Saco de São Diogo, and praia de São Cristóvão all the way to the small mangroves of Manguinhos — the sequence of beach coves and rocky headlands was straightened out by the current berths for large ships at the Port of Rio. The landfilled Saco de Inhaúma and the buried Complexo da Maré leave behind only photographs of the time when the sea waters dominated the coastal landscape of the Guanabara shoreline.
Image description: This is a photograph of a beach at sunset. On the left side, we see a city with buildings and houses close to the water. Moving toward the right, the horizon is marked by distant mountains. The sky is covered with clouds, with shades of blue and yellow reflected on the calm water. The sun is close to the horizon, lighting up the landscape with a beautiful golden hue.Ramos Beach and Piscinão de Ramos at sunset behind the Mendanha Massif. On the left in the background, the silhouette of the Maciço da Pedra Branca.
Just to the north, Piscinão de Ramos, officially called Parque Ambiental da Praia de Ramos, sits on the old stretch of beach as an artificial structure built in the 2000s on the shores of Guanabara Bay, offering a leisure alternative for the local population in the face of coastal water pollution. With a large treated saltwater pool and an artificial sand strip, the space simulates an urban beach and has become a symbol of both social inclusion and the city's environmental contradictions. Located in an area once marked by the bustling summers of Praia de Ramos, amid dives and camera flashes, the piscinão represents an attempt at reconciliation between the intense urbanization of Rio's periphery and access to the waterfront, even as it contends with ongoing challenges of maintenance, water quality, and surrounding urban infrastructure.
Further north, in the area surrounding Ilha do Governador, the coastal landscape becomes dominated by low-energy beaches under the calm waters of the bay's interior and less pronounced rocky headlands, such as Bica, Dendê, Pitangueiras, Bandeira, and Cocotá beaches, which historically lost their swimmability and fishing activity to pollution. The lack of sanitation and the decay to which we have driven the waters of Guanabara Bay has profoundly impacted the economy and quality of life of the island's residents, but it is still possible to observe remnants of original coastal environments with exuberant scenic beauty.
Image description: This is a photograph of a beach located on Guanabara Bay. On the left side, we see an area covered by green trees, extending to the water's edge. Moving to the right, we find colorful houses and buildings arranged along the beach. In the center of the image, there is a large body of water with several boats floating on it. Further back, we see distant islands and mountains under a clear blue sky with some clouds.Engenhoca Beach, with the Sagrada Família Parish and Ilha da D'água island in front of it
Image description: This is a photograph of a beach overlooking Guanabara Bay. On the left side, there is a blue boat moored by the shore. The water is calm and blue, reflecting the clear sky. On the horizon, there is a city with many buildings spread across the hills. In the distance, we see mountains covered with vegetation. The sky is blue with a few white clouds.Rosa Beach, on the north coast of Governador Island
Image description: This is a photograph of a beach with rocks along the shore. On the left side, we see a distant horizon with mountains and a few ships in the distance. The center of the image features a large body of water, possibly a bay, with gentle waves. On the right, there are more rocks and a line of trees or vegetation in the background. The sky is light blue, cloudless, and the lighting suggests it is daytime.Bananal Beach, next to Guanabara Beach, where Pedra da Onça is located
And, of course, we cannot forget the still-preserved outlines of the coastline of Paquetá Island, where history, poetry, and literature blend with the bucolic landscape of rocky points and fine sandy beaches at the far end of Guanabara Bay. From Iracema beach to Catimbau beach, from Tamoios beach to Moreninha beach, several rocky points cut across shy beach arches, creating a tangle of hollows and habitats for terrestrial flora and marine fauna in an intricate ecosystemic complexity. This complexity certainly nourished, with extreme abundance, the life of the native peoples who fought over its resources before the arrival of Europeans in these waters. Today Paquetá's scenic beauty endures, when the tides are not overwhelmed by floating solid waste or even by the foul smell of untreated sewage dumped into the coastal waters.
Image description: This is a photograph of a beach featuring a monument. On the left side, we see trees and an isolated tower. In the center, there is a monument built of stones, with an arched opening at the top. Inside this opening, there is something blue hanging. In the background, we see the sea water and an island with buildings. On the right, there is a rocky mountain and more trees. The sky is clear and blue.Iemanjá at Praia da Guanabara Beach, Ilha do Governador
Over time, the coastline of Guanabara Bay in the municipality was intensely reshaped, both by landfills and by the construction of ports, expressways, and industrial areas, altering the sediment dynamics and the tidal regime. Despite this, the remaining rocky shores keep alive the relationship between the crystalline bedrock's relief and the marine environment, composing a landscape of strong geographic, ecological, and symbolic value.
