4 Best Ancient Ruins in Serra da Bocaina National Park

If you’ve ever hiked Serra da Bocaina National Park for its cascading waterfalls, misty Atlantic Forest trails, or sweeping views of the coast between São Paulo and Rio de Janeiro, you might have missed half the park’s most fascinating secret: its scattered ancient colonial ruins. Tucked away in remote corners of this 100,000-hectare protected area are the crumbling remains of settlements, military outposts, and plantations that tell the story of Brazil’s gold rush, coffee boom, and early colonial border conflicts, all without the crowds of more famous archaeological sites across the country.

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These ruins aren’t just dusty piles of stone, either. Many are surrounded by orchards of native fruit trees, hidden swimming holes, and trails that wind through old-growth forest, so you can easily pair a history stop with a day of hiking, birdwatching, or a dip in a natural pool. Whether you’re a history buff, a casual hiker who loves a good hidden gem, or someone planning a multi-day trek through the park, these four ancient sites are well worth the extra effort to track down.

1. Ruins of 18th-Century São João Batista de Bocaina Settlement

This was one of the first permanent colonial settlements in the region, founded in the 1720s by gold miners who staked claims in the Bocaina mountain streams after the initial gold rush in Minas Gerais started to slow. The settlement had a small church, a handful of family homes, and a communal milling area for cassava, and it thrived for about 40 years before most residents moved to the growing coastal town of Paraty to work in the port. What’s left now is the stone foundation of the church, a few low stone walls of the homes, and a handful of ceramic shards scattered around the site, all tucked into a quiet clearing of jabuticaba and ingá trees just off the park’s main Santa Branca trail. It’s perfect for casual day hikers who don’t want to trek more than 3 kilometers from a trailhead to reach a historic site, and the remote location means you’ll almost never run into other visitors here.

The small clearing around the ruins also makes a great spot for a midday picnic if you’re hiking the longer Santa Branca loop, and the shade of the native fruit trees keeps the area cool even on hot, sunny days.

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• Plan your visit for the dry season (May to September) to avoid slippery mud on the short approach trail, and bring a pair of long pants to protect against ticks that are common in the surrounding forest undergrowth.
• Stop by the park’s Santa Branca visitor center before you head out to pick up a free trail map that marks the unmarked side path to the settlement, as the turnoff is easy to miss if you’re only following the main Santa Branca trail markers.

2. Remains of the Bocaina Military Fort

This was built by the Portuguese crown in 1754, specifically to guard the gold transport route between the mines of Minas Gerais and the port of Paraty, which was the main exit point for gold heading to Portugal. The small stone fort sat on a rocky outcrop overlooking the valley below, and it housed a small garrison of 12 soldiers who patrolled the trail for smugglers and runaway enslaved people who tried to escape with gold. The fort was abandoned in 1810 when the gold rush had mostly dried up, and most of the wooden structures rotted away, but the low stone walls of the watchtower and the barracks still stand, along with a few cannon mounts that face out over the valley. This site is ideal for more experienced hikers who don’t mind a steep 2-hour uphill climb from the Paraty trailhead, and the views of the valley and distant coast from the fort site make the effort worth it even if you’re not super into history.

• Visit first thing in the morning, right when the park opens at 8am, to avoid the midday heat on the steep uphill climb, and to catch the best light for photos of the valley views from the fort’s watchtower remains.
• There are no facilities or water sources on the trail to the fort, so pack at least 2 liters of water per person and a small snack to fuel the 2-hour uphill trek, even if you’re an experienced hiker.

3. Ruins of the 19th-Century Fazenda Santa Bárbara Coffee Plantation

This plantation was founded in 1832 by a Portuguese coffee baron who bought up thousands of acres of forested land in the Bocaina foothills to grow coffee, which was Brazil’s top export at the time. The plantation had a large main house, slave quarters, a coffee processing mill, and a small port on the nearby river where coffee beans were loaded onto mules to be taken to Paraty for export. The plantation was abandoned in 1888, when slavery was abolished in Brazil and the owner couldn’t afford to pay workers to harvest the coffee, and the main house burned down in a wildfire in 1920, leaving only the stone ruins of the slave quarters and the mill’s stone foundation. This site is perfect for visitors who want to learn about a lesser-documented part of Brazilian history, as the ruins of the slave quarters are one of the few remaining physical reminders of the enslaved labor that built Brazil’s coffee industry in the region. It’s also a great stop for multi-day trekkers, as it sits right on the park’s 3-day Trans-Bocaina Trail route.

If you’re hiking the Trans-Bocaina, you can easily spend an hour exploring the ruins before heading to the nearby campground for the night, and the small river near the plantation is a great spot for a post-hike swim.

• Plan your visit for late afternoon, when the golden light hits the stone ruins of the slave quarters for the best photos, and you can easily stop for a quick dip in the small, shaded natural pool at the base of the hill on your way back down.
• If you’re hiking the park’s multi-day Trans-Bocaina Trail, reserve your spot at the small Santa Bárbara campground (just 1 kilometer from the ruins) at least 2 weeks ahead of time, as it only has 12 sites and sells out most weekends.

4. Ruins of the Old Paraty-Minas Roadway Outpost (Posto da Estrada Real)

This outpost was built in the 1760s as a rest stop for travelers and mule drivers carrying gold, coffee, and supplies along the Estrada Real, the main colonial road that connected the gold mines of Minas Gerais to the coast. The outpost had a small stone inn, a stable for mules, and a customs post where officials checked for smuggled gold or untaxed goods, and it operated for almost 100 years before the road was rerouted further inland and the outpost was abandoned. Most of the stone structure is still standing, including the inn’s stone walls, the stable’s stone troughs, and the customs post’s small stone counter, and the site is surrounded by a small orchard of mango and orange trees that were planted by the outpost’s original owners. This site is great for families with older kids, as the approach trail is flat and only 1.5 kilometers long from the park’s Paraty entrance, so it’s an easy add-on to a day of visiting the park’s waterfalls or birdwatching.

• Visit on a weekday, when the nearby day-use parking lot fills up with visitors heading to the park’s popular waterfalls, so you’ll have the outpost ruins almost entirely to yourself without the crowds.
• There are no food or water vendors near the outpost, so pack a small snack and a reusable water bottle, and you can enjoy your break under the shade of the 200-year-old mango trees planted by the original outpost owners while you explore the site.

What makes these ruins so special isn’t just the history they hold, it’s how seamlessly they blend into the wild, untouched landscape of Serra da Bocaina. You can spend your morning exploring a 300-year-old fort, then spend your afternoon swimming in a hidden waterfall just a short trail away, and you’ll almost certainly have the whole site to yourself. If you’re tired of overcrowded tourist spots and want to explore a part of Brazil’s history that most visitors never even know exists, these ruins are the perfect reason to plan a trip to this underrated national park.